SL-14 — AI Feynman : découvrir des équations

Papier digéré : AI Feynman 2.0: Pareto-optimal symbolic regression exploiting graph modularity — Udrescu, Tan, Feng, Neto, Wu, Tegmark (MIT IAIFI + Beneficial AI Foundation), NeurIPS 2020, arXiv:2006.10782. Outil : aifeynman (pip).

Peut-on retrouver, à partir de données seules, la formule qui les a engendrées ? AI Feynman répond oui pour les équations de la physique : entraîné sur la table de l’énergie cinétique relativiste, le programme redécouvre E = mc²(1/√(1−v²/c²) − 1) — et son approximation classique mv²/2 — sans aucun indice sur la physique. Ce notebook exécute le vrai outil aifeynman sur ce cas, puis ouvre les trois idées qui rendent la recherche faisable :

  1. lire des symétries dans les gradients d’un réseau pour diviser le problème en sous-problèmes plus petits ;
  2. remplacer la MSE par une longueur de description (MEDL) pour résister aux outliers ;
  3. tracer un front de Pareto complexité–précision plutôt que de retourner « la » formule.

Note d’environnement : le paquet aifeynman (figé en 2021) compile des solveurs Fortran à l’installation via numpy.distutils — il exige Python 3.9 et NumPy < 2. Ce notebook s’exécute donc dans le conteneur aifeynman:sl14 fourni avec la série (image assets/Dockerfile.aifeynman, Python 3.9 + gfortran + torch CPU). Le résumé d’exécution est donné en conclusion.

import os
import time

import numpy as np
import pandas as pd
import torch
import matplotlib.pyplot as plt

import aifeynman

SEED = 42
np.random.seed(SEED)
torch.manual_seed(SEED)

print("aifeynman", getattr(aifeynman, "__version__", "2.0.7 (sdist)"))
print("torch", torch.__version__, "| numpy", np.__version__)

RUN_DIR = "_sl14_runs"
os.makedirs(RUN_DIR, exist_ok=True)
aifeynman 2.0.0
torch 2.8.0+cpu | numpy 1.26.4

1. Chercher dans l’espace des formules

L’espace des formules est l’ensemble des arbres d’expressions qu’on peut construire sur une base d’opérations (+, −, ×, ÷, √, exp, log, sin, cos…) : la combinatoire explose exponentiellement avec la profondeur. Une recherche exhaustive est condamnée — sauf si l’on exploite la structure de la cible (section 3) et si l’on sait mesurer ce qu’est une bonne formule.

AI Feynman mesure chaque candidate en bits de description (le critère MDL, minimum description length) : un réel coûte log⁺(r/ε) bits, une constante paramétrée k·log₂n bits. La table 2 du papier donne l’exemple canonique : mv²/2 = 13,6 bits (4 fonctions de base, 6 occurrences).

Plutôt qu’une seule formule, la recherche retourne le front de Pareto complexité × erreur : chaque point est un compromis, et les coins convexes du front révèlent les formules « utiles ». C’est la figure 1 du papier : l’énergie cinétique exacte (complexe mais exacte) et l’approximation classique mv²/2 (13,6 bits, erronée aux hautes vitesses) cohabitent sur le front — deux réponses à deux questions différentes.

# Energie cinematique relativiste : E = m c^2 (1/sqrt(1 - v^2/c^2) - 1)
# Unites naturelles : c = 1 (une constante de moins a decouvrir).
c = 1.0
N = 400
m = np.random.uniform(0.5, 2.0, N)
v = np.random.uniform(0.05, 0.9, N)   # v < c toujours
bruit_relatif = 1e-3                   # gaussien, 0.1 % (r = -3, cf. table 3 du papier)

E_exact = m * c**2 * (1.0 / np.sqrt(1.0 - v**2 / c**2) - 1.0)
E_obs = E_exact * (1.0 + np.random.normal(0.0, bruit_relatif, N))

data = pd.DataFrame({"m": m, "v": v, "E": E_obs})
data.describe().round(4)
m v E
count 400.0000 400.0000 400.0000
mean 1.2413 0.4748 0.3380
std 0.4406 0.2497 0.4513
min 0.5076 0.0592 0.0011
25% 0.8619 0.2556 0.0386
50% 1.2676 0.4776 0.1416
75% 1.6213 0.6965 0.4344
max 1.9858 0.8998 2.3668

Lecture du jeu de données. 400 points, m ∈ [0,5 ; 2], v ∈ [0,05 ; 0,9] (strictement inférieurs à c), c fixé à 1 — une variable de moins à découvrir rend le problème jouet lisible sans rien perdre de la structure (E reste non polynomiale en v). Le bruit gaussien relatif de 0,1 % correspond à r = −3 dans l’échelle du papier (bruit gaussien 10^r ; table 3 : 73 équations sur 100 encore résolues à r = −1) : nous sommes très en deçà du seuil de rupture, l’objectif ici est de comprendre la mécanique, pas de tester la robustesse (exercice 3).

# Format aifeynman : colonnes separees par des espaces, la derniere est la cible.
data_path = os.path.join(RUN_DIR, "kinetic.txt")
np.savetxt(data_path, data[["m", "v", "E"]].values, fmt="%.8f")
with open(data_path) as f:
    print("".join(f.readlines()[:5]))
1.06181018 0.13765529 0.01019731
1.92607146 0.81716997 1.41616816
1.59799091 0.47946452 0.22337382
1.39798773 0.75248885 0.72563700
0.73402796 0.32204216 0.04137145

2. Lancer la recherche : run_aifeynman

La fonction d’entrée orchestre trois moteurs complémentaires :

Moteur Paramètre Rôle
Brute force BF_try_time, BF_ops_file_type énumère les formules sur la base d’opérations (fichiers 7/10/14/19ops.txt), bornée en temps par étape
Polyfit polyfit_deg teste les ajustements polynomiaux (une équation physique peut être un polynôme)
Réseau NN_epochs entraîne le NN 128/128/64/64 tanh qui sert aux tests de modularité (section 3)

Deux choix délibérés pour ce run : nous ne passons pas vars_name — le paquet ferait alors une analyse dimensionnelle et réduirait (m, v) à une seule combinaison, ce qui résoudrait le problème plus vite mais court-circuiterait la section 3 (nous voulons lire la séparabilité nous-mêmes) — et nous bornons le budget (BF_try_time=30 s, 500 epochs ; la démo officielle utilise 60 s et se résout en 10–30 min). Les résultats s’écrivent dans _sl14_runs/results/solution_kinetic.txt : une ligne par candidate du front, avec ses colonnes d’erreur et son expression au format SymPy (variables x0 = m, x1 = v).

origine = os.getcwd()
os.chdir(RUN_DIR)   # le paquet ecrit results/ relativement au cwd
os.makedirs("results", exist_ok=True)
t0 = time.time()
aifeynman.run_aifeynman(
    pathdir="./",
    filename="kinetic.txt",
    BF_try_time=30,
    BF_ops_file_type="14ops.txt",
    polyfit_deg=3,
    NN_epochs=500,
    test_percentage=20,
)
duree_run = time.time() - t0
os.chdir(origine)
print(f"run_aifeynman termine en {duree_run:.1f} s")
Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve ./kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     27.043502428837     -3.003498571013                      P               1             0.0000          8653.9208             0.4897             2.2287             2.3549           320.0000
     26.411952606475     -0.209122000000                      b               3             1.5850          8453.4098             0.2968             1.6845             2.4258           320.0000
     25.284693584471     -0.011230029716                    bb*              48             5.5850          8096.6869             0.2683             1.5833             2.8915           280.3542
     25.207826324897     -0.008691881572                   bbS*             444             8.7944          8075.2988             0.2931             1.6820             3.1247           208.0991
     25.098936051977     -1.713560529069                   bCCE            3408            11.7347          8043.3942             0.3420             1.8346             3.1998           194.8782
     24.873604528915     -3.143497381606                  PbCR/            6472            12.6600          7972.2134             0.2634             1.5469             3.3193           189.2892
     24.680659856333      0.022101394231                  ab\E/            6770            12.7249          7910.5361             0.3371             1.7051             3.2589           187.2511
     24.624159452569     -0.006967840955                 bbaS**           42879            15.3880          7895.1190             0.2727             1.6397             3.1135           168.6963
     24.506868456589      0.011005138490                 abC\<*           64658            15.9805          7858.1784             0.2222             1.1939             2.8459           164.0379
     24.240081711207      0.014274496801                 ab\E</           78158            16.2541          7773.0803             0.2584             1.4040             3.0767           158.6457
     23.745871984738     -0.993325910292                 baR*C\          124254            16.9229          7615.6020             0.1386             0.6353             3.0434           147.5533
     23.053900080319      0.840285794492                bba**<S          730515            19.4786          7396.7266             0.1721             0.9948             3.7730            99.9212
     23.053900080319      0.840285794492                abb**<S          730523            19.4786          7396.7266             0.1721             0.9948             3.7730            99.9220
     22.169153045787     -0.999288086241                abC\<*E         1339193            20.3529          7114.4819             0.0821             0.4140             3.2545            95.7230
     21.947600527923     -1.000009256968                abCL*>\         1472924            20.4903          7043.7224             0.6218             8.0917             5.0189            91.8499
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve ./kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   2.3668279000000001        2.3668280124182930E-003
           3  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     27.038440040237      0.043956738312                      P               1             0.0000          8571.1855             0.4902             2.2287             2.3613           317.0000
     26.140043969462      0.315356359261                      b               3             1.5850          8287.9789             0.4306             2.0857             2.6135           317.0000
     26.072281641614      0.281532711077                    ba*              45             5.4919          8270.4051             0.3917             1.8740             2.6030           314.3333
     24.962482168948      0.779464412373                    bb*              48             5.5850          7918.6918             0.3163             1.7474             3.2938           314.5000
     24.953066277108     -1.505813676277                    bCL             276             8.1085          7918.2305             0.2951             1.6670             3.2772           253.7572
     24.894974031237     -0.220361843945                   bbL/             624             9.2854          7900.9922             0.1991             0.9631             3.1617           262.3542
     24.878593992728      1.451710222717                   bC\<            1626            10.6671          7897.1814             0.2570             1.5079             3.2704           254.3376
     24.029273517043      0.600882381349                  bba**            3621            11.8222          7629.1019             0.2733             1.4291             3.3618           234.4463
     23.747274488761     -1.156831811733                  abCL*            5258            12.3603          7540.2463             0.2462             1.3110             3.4141           231.7478
     23.313575532648     -0.196582645886                 babL/*           43425            15.4062          7405.8097             0.0885             0.6287             2.5683           183.1230
     23.154653556146     -1.092194534688                 aabC/-           44369            15.4373          7355.4624             0.1989             1.0978             3.5308           181.7622
     23.118920832027      0.456742213930                bbba+**          521652            18.9927          7347.6906             0.2248             1.3304             4.0226           115.7802
     22.987280246027     -0.081952885716                aabRL/+          533555            19.0253          7305.9931             0.0351             0.2739             2.3688           117.1049
     22.330151471537      0.477987669603                babE<**          536580            19.0334          7097.6915             0.2091             1.1629             4.3394           116.9269
     21.588629378323     -1.025056014392                abCL\>/         1065413            20.0230          6863.6185             0.1032             0.6188             3.7732           120.0195
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
44.0 27.05 0.043956738312*pi
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
68.16 22.17 -0.999288086241+exp((x0*((cos(x1))**(-1)-1)))
72.51 21.95 -1.000009256968+(((x0*log(cos(x1)))+1))**(-1)
73.54 21.59 -1.025056014392*(x0/((log(cos(x1)))**(-1)+1))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.503652667866     -3.122522741225                      P               1             0.0000          8161.1689             0.7772             5.5828             3.0578           320.0000
     25.503652667866    -23.121624656015                     PE              28             4.8074          8165.9762             0.7772             5.5828             3.0578           272.4286
     25.503652659911    666.000000000000                    PS\             163             7.3487          8168.5176             0.7772             5.5828             3.0578           254.5276
     25.428859429087     -0.559281798174                    bCC             249             7.9600          8145.1950             0.7033             5.3521             2.9737           254.0241
     24.757338468379      0.249746445718                   bbR-             516             9.0112          7931.3595             0.7212             5.4048             3.4714           230.1163
     24.489385011609      0.003780718394                   bbS-             525             9.0362          7845.6394             0.7476             5.4846             3.6398           230.4495
     24.285540411764     -1.003120319156                   bbS/             606             9.2432          7780.6161             0.7382             5.4591             3.8043           224.7442
     24.175460174783     -0.501348231808                   bC>\            2031            10.9880          7747.1352             0.7478             5.4891             3.9122           207.2629
     23.791590015144     -0.000699359135                  bbSS-            5817            12.5061          7625.8149             0.7251             5.4130             4.1997           190.2938
     23.322691852462      1.000193621472                  bb*C~           11046            13.4312          7476.6926             0.6974             5.3022             4.5909           183.1261
     23.278329887625     -0.999846654552                  bb*C\           11370            13.4729          7462.5385             0.6697             5.1741             4.5828           183.0363
     23.165062214767      0.841418681474                 PbC*CS          130105            16.9893          7429.8092             0.6560             5.1426             4.8867           163.3424
     22.963724194567     -0.367854358284                 PbC/CE          139015            17.0849          7365.4766             0.5638             4.6413             4.9461           163.6310
     22.960053149815      0.911741535564                 bb*CEC          171669            17.3893          7364.6063             0.6517             5.1196             5.1597           164.9185
     22.876527120122      0.000035149450                aPb/ER/          666419            19.3461          7339.8347             0.6952             5.2647             5.1941           164.0246
     22.811363129674      0.999618963726                bba**C~          721011            19.4597          7319.0959             0.5760             4.6124             4.3765           163.6604
     22.265897462031     -0.540368627410                bba**CC          736563            19.4904          7144.5776             0.6586             5.1423             4.9537           163.0535
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   5.6018743082184104        5.6018745742931622E-003
         113  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.386400729286      0.005721503388                      P               1             0.0000          5254.9850             0.6723             4.0586             3.1279           207.0000
     25.299979035661      0.017093080125                      a               2             1.0000          5238.0957             0.6689             4.0427             3.2665           207.0000
     24.770785696138      0.040041647858                      b               3             1.5850          5129.1376             0.6665             4.0418             3.4886           207.0000
     24.081415991066      0.001847738052                     a<               8             3.0000          4987.8531             0.6789             4.0748             4.4139           207.0000
     24.049667676205      0.003831596459                    aR<             107             6.7415          4985.0227             0.6790             4.0750             4.4923           199.2991
     23.947492268327      0.000299110999                    aES             227             7.8265          4964.9574             0.6794             4.0763             4.5778           193.4053
     23.736675810911      0.000693708755                    b>C             231             7.8517          4921.3436             0.6794             4.0768             4.9071           193.6407
     23.669537514751     -0.000043839101                   bb<+             327             8.3531          4907.9474             0.6794             4.0766             5.0509           190.1162
     23.307022707523      1.207487441406                   bbS-             525             9.0362          4833.5899             0.6376             3.9495             4.6003           195.3067
     23.301226477920     -0.389862091082                  bbCL*            5259            12.3606          4835.7145             0.6316             3.9285             4.5645           183.5824
     23.295324604566      0.234448440090                  ab\E/            6770            12.7249          4834.8571             0.6378             3.9297             4.8509           183.5708
     23.171970628397      0.752989863250                  bb\E/            6771            12.7252          4809.3231             0.6107             3.8697             5.0292           183.5742
     23.166402244742      0.232930591879                  PbL*E            9559            13.2226          4808.6679             0.6308             3.9269             4.7179           184.2920
     22.831155442980     -1.135985230830                  bb*C<           10722            13.3883          4739.4375             0.5848             3.7681             5.1499           185.1876
     22.773431908733     -1.124613089207                  bb*CL           12666            13.6287          4727.7291             0.5729             3.7203             5.1731           182.3671
     22.773155792014     -4.120980926006                  bCLC<           25683            14.6485          4728.6918             0.5648             3.6888             5.1719           183.4471
     22.769562767365     -1.187099859300                 bbS*CL          135930            17.0525          4730.3520             0.5920             3.7937             5.2467           174.2981
     22.768172678085     -4.234577550165                 bCLSC<          377061            18.5244          4731.5362             0.5678             3.7025             5.2044           172.8678
     22.757249924770     -4.139722974756                 bCLSCL          495159            18.9175          4729.6683             0.5659             3.6937             5.1862           164.4947
     22.263529594616     -0.109463631423                aPb\E-/          557825            19.0895          4627.6401             8.7315            88.5642             5.2903           164.9781
     22.079627190687     -0.891277693321                abb*C<*          645743            19.3006          4589.7834             0.5610             3.5973             5.3858           167.8386
     22.049107435392     -0.880520210487                abb*CL*          651575            19.3136          4583.4788             0.5460             3.5242             5.3287           167.8294
     21.804678722118     -0.731883164637                bba**C<          717123            19.4519          4533.0204             0.5321             3.4004             5.2548           168.8051
     21.667641884228     -0.708519335865                bba**CL          740451            19.4980          4504.6999             0.4300             2.2521             5.2353           168.6741
     21.502622220372     -2.684165075766                abCL*C<         1437932            20.4556          4471.4984             0.4873             3.1315             5.3381           166.8854
     21.436731752692     -2.653178739745                abCL*CL         1595396            20.6055          4458.0090             0.4625             2.9251             5.3571           165.1191
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
44.0 27.05 0.043956738312*pi
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
68.16 22.17 -0.999288086241+exp((x0*((cos(x1))**(-1)-1)))
72.51 21.95 -1.000009256968+(((x0*log(cos(x1)))+1))**(-1)
73.54 21.59 -1.025056014392*(x0/((log(cos(x1)))**(-1)+1))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_atan/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     26.918982394211     -3.004366480425                      P               1             0.0000          8614.0744             0.3329             1.0338             2.2361           320.0000
     26.109183408133     -0.218172365377                      b               3             1.5850          8356.5237             0.1490             0.4977             2.2761           320.0000
     25.046129852969     -0.013883609362                    bb*              48             5.5850          8020.3465             0.1177             0.3902             2.5758           260.4375
     25.017053641529     -0.010493432352                   bbS*             444             8.7944          8014.2516             0.1337             0.4880             2.7150           193.4865
     25.009110936306     -0.011465045948                   bb*S             831             9.6987          8012.6142             0.1294             0.4688             2.7156           186.7738
     24.957120772412      0.918113357647                   bCEC            2976            11.5392          7997.8178             0.1521             0.5519             2.7667           182.4362
     24.935910772940      0.618787562479                   bCCL            3165            11.6280          7991.1194             0.2180             0.7642             3.1041           179.0117
     24.893913454556     -1.713886357823                   bCCE            3408            11.7347          7977.7870             0.1771             0.6392             2.9730           179.2512
     24.847643568874     -0.004711094509                  bb>L*            5205            12.3457          7963.5916             0.1664             0.6076             3.0314           176.3881
     24.656776281901     -3.144806193841                  PbCR/            6472            12.6600          7902.8284             0.1115             0.3524             2.9247           174.8684
     24.398514158678      0.021255507075                  ab\E/            6770            12.7249          7820.2495             0.1771             0.5576             3.0247           172.8626
     24.346548638895     -0.007562583148                 bbaS**           42879            15.3880          7806.2835             0.1044             0.4445             2.8022           155.4290
     23.913992874248      0.009772102470                 abC\<*           64658            15.9805          7668.4583             0.0722             0.3048             2.4476           147.0533
     23.902295263498      0.012343030267                 ab\E</           78158            16.2541          7664.9886             0.1018             0.4003             2.6903           135.8307
     22.957827138047     -0.998478358716                 baR*C\          124254            16.9229          7363.4276             0.1335             0.9947             3.3454           118.5856
     21.065665888250     -0.999995461249                abC\<*E         1339193            20.3529          6761.3660             0.1424             1.0250             5.0640            82.1013
     21.065665888161     -0.999995461249                abC/a-E         1697699            20.6952          6761.7082             0.1424             1.0250             5.0640            81.5247
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_atan/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   1.1710396523211941        1.1710397079425930E-003
           1  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     26.928923766720      0.044269970766                      P               1             0.0000          8590.3267             0.3326             1.0320             2.2305           319.0000
     25.987718401890      0.311913475381                      b               3             1.5850          8291.6671             0.2697             0.8930             2.4678           319.0000
     25.906557212296      0.286833510012                    ba*              45             5.4919          8269.6836             0.2303             0.6909             2.4453           314.8667
     24.740912450006      0.762558340310                    bb*              48             5.5850          7897.9360             0.1557             0.5650             3.1156           315.1250
     24.682915339677     -1.487319199953                    bCL             276             8.1085          7881.9585             0.1351             0.4798             3.0551           249.6268
     24.620069784847      1.408092035869                   bC\<            1626            10.6671          7864.4694             0.1105             0.3386             2.9535           249.2675
     23.712034781370      0.598237195971                  bba**            3621            11.8222          7575.9613             0.1171             0.4178             3.0149           229.2742
     23.328741524990     -1.149390202927                  abCL*            5258            12.3603          7454.2288             0.0932             0.3663             3.0432           203.9563
     22.380721958763     -1.075943113912                 aabC/-           44369            15.4373          7154.8876             0.0587             0.2761             3.0555           125.6637
     21.544781662523      0.474068046101                babE<**          536580            19.0334          6891.8188             0.0633             0.3028             3.8245            76.6125
     20.125776498988     -1.006165943256                abCL\>/         1065413            20.0230          6440.1457             0.0740             0.5448             4.3763            86.5463
     20.125776498988     -1.006165943256               aabCL>/-         7184600            22.7765          6442.8992             0.0740             0.5448             4.3763            58.0266
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
68.16 21.56 tan(-0.999995461249+exp(((x0/cos(x1))-x0)))
79.05 20.8 tan(-1.006165943256*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_cos/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     24.486798507841     -2.151374223418                      P               1             0.0000          7835.7755             0.3038             1.7048             2.9549           320.0000
     24.486798507841      4.131811258608                     P~              10             3.3219          7839.0975             0.3038             1.7048             2.9549           205.4000
     24.486798507841     -8.879386432788                    PP*              40             5.3219          7841.0975             0.3038             1.7048             2.9549           189.4750
     24.486798507841      2.990218517595                    PC<             112             6.8074          7842.5829             0.3038             1.7048             2.9549           189.8214
     24.486798445589    666.000000000000                    PS\             163             7.3487          7843.1242             0.3038             1.7048             2.9549           195.0184
     24.486795736826      0.990218571397                   bPS*             438             8.7748          7844.5494             0.3038             1.7048             2.9549           181.8356
     24.135070001650      0.697449718275                   bP+\             744             9.5392          7732.7616             0.2873             1.6600             3.1268           173.7917
     22.783478400937      0.000371141626                   bb*C             867             9.7599          7300.4730             0.2206             1.4154             4.0842           174.9319
     22.738943810333      1.000435507117                   bSb-            1191            10.2180          7286.6800             0.2708             1.6015             4.1462           164.5802
     22.565224986307      0.000216588209                  bbS*C            8895            13.1188          7233.9908             0.2371             1.4838             4.4391           144.9107
     22.391464238289     -0.000138141883                  bb*CR           11694            13.5135          7178.7820             0.2585             1.5514             4.3273           144.5129
     22.109919223812      0.158490550278                  bb*CS           12018            13.5529          7088.7271             0.2497             1.5177             4.6767           145.0419
     22.059389938607     -1.718264506226                  bC<CE           40830            15.3173          7074.3221             0.2524             1.5351             4.8849           148.4835
     22.013654898161     -0.000038347579                 bE<C<C          464628            18.8257          7063.1953             0.2106             1.3607             4.8360           140.4251
     21.955620303022     -1.718284491451                 bSC<CE          513840            18.9710          7044.7695             0.2716             1.6051             5.0696           140.6745
     21.707535873720      0.000193150423                bba**CR          728787            19.4751          6965.8866             0.1675             0.9232             4.2016           135.7756
     21.435341487500     -0.000608172634                ab\E</C         1300205            20.3103          6879.6196             0.2180             1.2968             4.3162           113.5505
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_cos/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.99999936441704151        9.9999941191446272E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     24.486798507841      0.315196334862                      P               1             0.0000          7835.7755             0.3038             1.7048             2.9549           320.0000
     24.486798507841      0.239091233619                     P>               4             2.0000          7837.7755             0.3038             1.7048             2.9549           208.5000
     24.466061765513     -0.315279612870                     P~              10             3.3219          7832.4617             0.3039             1.7051             2.9711           192.6000
     24.466061765513     -0.990480143181                     PC              22             4.4594          7833.5992             0.3039             1.7051             2.9711           198.4545
     24.466061765513     -1.177081754527                    PCS             220             7.7814          7836.9211             0.3039             1.7051             2.9711           188.7591
     23.577030323323      0.242269110016                   PbC+             370             8.5314          7553.1811             0.2775             1.6279             3.5148           188.1027
     22.785477992431      1.000371325616                   bb*C             867             9.7599          7301.1128             0.2206             1.4153             4.0809           166.2041
     22.727358949091     -1.000451960946                  bbS>-            5412            12.4019          7285.1568             0.2708             1.6015             4.1704           150.6116
     22.727358949090     -1.000451960946                  bbS-<            7356            12.8447          7285.5996             0.2708             1.6015             4.1704           146.0741
     22.563833962820      1.000216970367                  bbS*C            8895            13.1188          7233.5456             0.2371             1.4837             4.4415           145.4298
     22.393319302427      0.499930852134                  bb*C>           10398            13.3440          7179.2062             0.2616             1.5647             4.3357           144.6373
     22.391550090345      0.999861798218                  bb*CR           11694            13.5135          7178.8095             0.2585             1.5514             4.3272           143.4783
     22.077881845233      1.188416884150                  bb*CS           12018            13.5529          7078.4751             0.2395             1.4806             4.8359           143.4603
     22.017422931197     -1.000009654777                 PbCR*C          101917            16.6370          7062.2124             0.2466             1.5098             4.9151           136.1186
     21.946316090933      1.188394397074                 bbS*CS          130098            16.9892          7039.8104             0.2546             1.5410             5.0275           135.8609
     21.916126272348     -2.402988138001                 bCLC>C          462597            18.8194          7031.9798             0.2397             1.4776             5.0548           139.7394
     21.760137200903      0.500092577960                bba**C>          713235            19.4440          6982.6879             0.2002             1.2198             4.2571           135.8163
     21.707779378552      1.000193229823                bba**CR          728787            19.4751          6965.9645             0.1674             0.9231             4.2014           135.0246
     21.450875511585      0.999391249118                ab\E</C         1300205            20.3103          6884.5905             0.2181             1.2971             4.2796           114.8974
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
68.16 21.56 tan(-0.999995461249+exp(((x0/cos(x1))-x0)))
79.05 20.8 tan(-1.006165943256*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_exp/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     27.400308245119     -1.993509080791                      P               1             0.0000          8768.0986             1.2274             9.5154             2.5935           320.0000
     26.802993490364      0.815078174667                      b               3             1.5850          8578.5429             1.0463             8.9570             2.7868           320.0000
     26.749478199554      0.828914249657                     bS              21             4.3923          8564.2253             1.0732             9.0566             2.7688           298.9048
     25.581428857561      0.992075438736                    bb*              48             5.5850          8191.6422             1.0292             8.8767             3.5464           289.6458
     25.581428857561     -2.149517302277                  Pbb*+            3520            11.7814          8197.8386             1.0292             8.8767             3.5464           235.5304
     25.574451211140      0.994385592269                  bbSS*            5088            12.3129          8196.1373             1.0743             9.0435             3.5478           232.8970
     25.510108044649      0.999081253675                  bb>L*            5205            12.3457          8175.5803             1.0921             9.0963             3.6000           233.5527
     25.356163718387     -2.141372834827                  PbCR/            6472            12.6600          8126.6324             1.0256             8.8414             3.6988           230.7579
     25.208311423958      0.997429686112                 bbaS**           42879            15.3880          8082.0476             1.0402             8.9320             3.4975           215.2876
     24.896718427670      1.021338605274                 ab\E</           78158            16.2541          7983.2040             1.0190             8.6936             3.5984           198.9918
     24.784846346618      0.999637343919                bba>L**          537816            19.0368          7950.1876             1.0370             8.8004             3.7821           166.9440
     24.734815908118      0.997673988770                bbaC>/*          540651            19.0443          7934.1854             0.9864             8.3779             3.8731           166.8648
     24.644457737621      0.999224523383                bbaCE/*          542595            19.0495          7905.2760             1.0025             8.4988             3.9713           166.7854
     24.358309014804      1.843427574115                bba**<S          730515            19.4786          7814.1374             0.9337             8.2884             3.7522           166.6157
     24.358309014804      1.843427574115                abb**<S          730523            19.4786          7814.1375             0.9337             8.2884             3.7522           166.6163
     23.869432743887      0.501245328347                ba>*C>\         1814769            20.7914          7659.0098             0.4229             3.4910             3.6387           150.9677
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_exp/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   10.663512848933307        1.0663513355422989E-002
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     27.400308245119      0.365446369045                      P               1             0.0000          8768.0986             1.2274             9.5154             2.5935           320.0000
     26.598096140159      0.857928724454                     b>               6             2.5850          8513.9757             1.0705             9.0408             2.7969           320.0000
     26.122970565576      0.478362755925                    b>>              69             6.1085          8365.4591             1.1465             9.2803             3.2156           264.7536
     25.984337347413      0.468063798646                    bE>              93             6.5392          8321.5271             1.0781             9.0540             3.2636           265.3548
     25.630062274040      1.859946584148                    bCC             249             7.9600          8209.5799             1.1101             9.1587             3.4662           253.9237
     25.575756049733      0.992301968530                   bb*>             651             9.3465          8193.5884             1.0308             8.8826             3.5407           241.3733
     25.459481116394      0.235246603940                  Pb<\-            5617            12.4556          8159.4895             0.8437             7.7570             3.3906           221.8638
     25.395263727054      0.467595398457                  PbC/<            7444            12.8619          8139.3463             1.0154             8.7930             3.6049           213.4641
     25.341180681173      0.580703752614                  bC\E<           26061            14.6696          8123.8474             0.9234             8.3918             3.6240           204.8119
     25.313397339902      0.043131685843                 PbCR/E          109207            16.7367          8117.0239             0.9234             8.3931             3.6796           192.1504
     25.065967200666      1.022347439347                 ab\E/E          109505            16.7406          8037.8501             1.0365             8.7254             3.6143           192.0289
     24.930300301124      1.843717266543                 baR*CC          133002            17.0211          7994.7172             1.0545             8.9111             3.7123           188.7379
     24.771672616304      1.019814473078                ab\E</>         1142741            20.1241          7947.0593             1.0147             8.6763             3.7440           160.1081
     24.654504366863      1.014376863930                ab\E</E         1352693            20.3674          7909.8088             0.9002             8.0443             3.4834           157.1187
     24.483314937096      1.009014658077                abCL*>\         1472924            20.4903          7855.1510             0.3918             3.1503             3.1093           155.8833
     24.191769580980      0.370342913136                baR*C\E         1954773            20.8986          7762.2648             0.4105             3.2861             3.4205           144.5530
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
68.16 21.56 tan(-0.999995461249+exp(((x0/cos(x1))-x0)))
79.05 20.8 tan(-1.006165943256*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_inverse/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     32.915507337057      4.002186459631                      P               1             0.0000         10532.9623            84.9861           879.8056             2.8459           320.0000
     32.899635911550      8.510391144772                     a~              11             3.4594         10531.3429            84.9041           879.0718             2.8759           320.0000
     32.879014821488      7.606481149101                     b~              12             3.5850         10524.8697            84.8665           879.4026             2.8466           320.0000
     32.742578510046      4.878780741324                     b\              15             3.9069         10481.5320            82.3476           865.3064             2.8537           320.0000
     32.169655663193      0.015262146901                    Pb/              64             6.0000         10300.2898            76.8216           834.2676             3.0490           320.0000
     32.157084880059     -0.333070863417                   PbS/             604             9.2384         10299.5056            76.9110           834.5847             3.1214           307.4752
     31.510107410353      1.713929771601                   bb*\             759             9.5680         10092.8023            49.9047           604.1941             2.8365           309.9499
     31.310983929020    -11.351156681805                  PPb/*            3676            11.8439         10031.3588            60.0691           732.8437             3.1001           283.9255
     31.310983929020    -11.351156681805                  PbP//            3880            11.9218         10031.4367            60.0691           732.8437             3.1001           285.0010
     31.277919906564     -6.033563735520                  PP+b/           10129            13.3062         10022.2406            68.7811           787.6498             3.2978           287.8642
     31.181653208748     -6.412341269511                  Pb/RE           12934            13.6589          9991.7879           108.3390          1024.2349             3.4604           284.9429
     31.169457090077     -0.330893349972                  b\>b/           21597            14.3985          9988.6248            47.9760           589.4746             2.9132           289.5297
     31.021861157624     -2.388009620352                  bC<\~           26979            14.7195          9941.7151            39.2196           327.0879             3.3787           284.6444
     30.913215215901     -3.169923498444                 bbC<\-           72516            16.1460          9908.3749            39.1551           327.8101             3.4962           273.8459
     30.912819687845     -2.634650341961                 bbCL\-           73002            16.1556          9908.2579            39.1582           327.7750             3.4979           273.8518
     30.790779744766     -4.287924681828                 Pb\+b/          113149            16.7879          9869.8374            44.2675           557.5293             3.1512           270.0257
     28.370700445913     -1.385066635470                aabC*-\          609182            19.2165          9097.8407             0.7223             2.0517             2.2623           219.0970
     28.370700445912     -1.385066635470                abC~>*\         1207163            20.2032          9098.8273             0.7223             2.0517             2.2623           125.4919
     27.173897589731     -0.587379801146                abC\<*\         1207973            20.2042          8715.8514             0.3078             0.9911             2.1804           125.4310
     26.593840034433     -2.745700964710               aabC<*\-         7467452            22.8322          8532.8610             0.3332             1.2292             2.4011            41.7018
     26.562626184591     -2.350078466851               aabCL*\-         7468910            22.8325          8522.8728             0.1799             0.8605             2.0551            41.6994
     26.562626184591     -2.350078466851               abCL\a/-        13782251            23.7163          8523.7567             0.1799             0.8605             2.0551            29.6267
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_inverse/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   886.94942614372121       0.88694946827155841     
          26  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     32.837210412240      2.154419192741                      P               1             0.0000          9654.1399            84.7413           880.1811             2.9142           294.0000
     32.636366985785      2.644974199432                     a<               8             3.0000          9598.0919            86.9484           887.9208             3.3528           294.0000
     31.910984720088    -13.473044425124                     b<               9             3.1699          9384.9994            83.0826           874.2801             3.3298           294.0000
     31.690441541533    -10.006590732621                     bL              27             4.7549          9321.7447            79.8609           858.7383             3.3067           283.2222
     31.127438456602      6.658678436378                    b\<             105             6.7142          9158.1812            68.2436           781.9801             3.4279           280.0667
     31.030474202175      1.272868506966                   bb*\             759             9.5680          9132.5274            44.7111           529.2206             3.0047           276.3676
     30.884350556719     -4.527325914164                   bLb/            1278            10.3197          9090.3187            54.7867           672.9756             3.2086           270.8592
     30.869853507023      1.789732962326                  bb*\<           10614            13.3737          9089.1106            38.4725           385.7500             3.3654           249.7881
     30.844437291603     -6.949477347630                  aRb\-           14849            13.8581          9082.1226            67.4242           775.9743             3.3931           249.7935
     30.012550791235      6.752988756825                  b\<a/           21381            14.3840          8838.0740            64.9132           718.7029             3.9804           251.7904
     29.930503375015     -0.858830559527                 abCL*\           93413            16.5113          8816.0793            11.9387           124.4743             2.8822           223.7055
     29.187762445831     -5.084330132280                 bLba*/          180909            17.4649          8598.6671            42.9616           507.1728             3.7331           171.6418
     29.187762445831     -5.084330132280                 bLa/b/          237825            17.8595          8599.0617            42.9616           507.1728             3.7331           162.8318
     28.792886292703     -0.964024817550                abC<*\>         1402454            20.4195          8485.5281             2.9788            31.2842             2.7863           122.6871
     27.923803512611     -1.001258499823                abCL*\>         1402940            20.4200          8230.0183             0.5338             1.5520             2.2769           122.6676
     27.692195925694     -0.974645725261                bCL\>a/         5100171            22.2821          8163.7877             2.1794            23.1932             2.7074            57.0557
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
68.16 21.56 tan(-0.999995461249+exp(((x0/cos(x1))-x0)))
79.05 20.8 tan(-1.006165943256*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_log/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     29.827479090306     -5.121412176256                      P               1             0.0000          9544.7933             1.6546             4.8080             2.2174           320.0000
     29.761042605269     -3.140342030551                      a               2             1.0000          9524.5336             1.6368             4.3188             2.2824           320.0000
     29.561379153581     -2.448069540551                      b               3             1.5850          9461.2263             1.4195             4.3994             2.2374           320.0000
     29.561379153581     -3.448069540551                     b>               6             2.5850          9462.2263             1.4195             4.3994             2.2374           320.0000
     29.099431619891     -1.154051980351                     bL              27             4.7549          9316.5730             1.0140             2.8145             2.2431           320.0000
     28.795308601941     -3.456187488649                    bP*              42             5.3923          9219.8911             0.9410             3.5190             2.3405           320.0000
     28.401728770375     -6.478278171378                    b>E             285             8.1548          9096.7080             0.7276             3.1949             2.2820           291.6421
     28.398034132521      0.756338594171                   PbL*             460             8.8455          9096.2164             0.7161             2.2863             2.2854           288.2761
     28.252911219146     -7.239668728779                   PbE*             469             8.8734          9049.8050             0.6330             2.8828             2.2570           286.8507
     27.973370544600     -0.250380720716                   bb*L             903             9.8186          8961.2972             0.5081             1.3417             2.2681           269.0366
     27.737990823207     -3.945987908275                  baP+*            3582            11.8066          8887.9636             0.6518             3.0669             2.3637           225.0064
     27.422860325209     -7.591957049334                  ab>E+            4556            12.1536          8787.4689             0.6982             2.7545             2.4620           222.2191
     26.994523399037     -4.538769600496                 baP>+*           42489            15.3748          8653.6223             0.4552             2.5338             2.4851           136.2206
     26.553299676302     -6.460609805513                 aLb>E+          187388            17.5157          8514.5716             0.7029             2.7548             3.1761           116.3318
     26.456744993969     -1.438525323199                abLP<*+          747983            19.5126          8485.6710             0.2688             0.9035             2.5243           111.3419
     26.405850851440     -0.984371355027                abC\<L+          932411            19.8306          8469.7029             0.2169             0.7204             2.3078           106.4385
     26.253729704183      0.088189006776                abC\<*L         1312949            20.3244          8421.5179             0.2112             0.6635             2.2053            91.2990
     26.253729704183      0.088189006776                abC/a-L         1693811            20.6918          8421.8853             0.2112             0.6635             2.2053            82.7273
     25.794788131332     -1.977699370602               babb*L++         6782004            22.6933          8277.0255             0.1458             0.5280             2.4961            58.1111
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_log/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   6.7877879639351582        6.7877882863377863E-003
           1  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     29.823242440901     -0.625874229483                      P               1             0.0000          9513.6143             1.6509             4.8215             2.2160           319.0000
     28.629079972762      3.733859510006                     b<               9             3.1699          9135.8464             0.8187             3.2767             2.2459           319.0000
     28.576425967667     -0.713866126208                     b\              15             3.9069          9119.7868             1.1041             6.0317             2.4076           314.8667
     27.876439906036      2.204283987978                     bL              27             4.7549          8897.3392             0.4668             1.1148             2.3049           309.8148
     27.873984419601     10.673780974448                   b<CL            3150            11.6211          8903.4222             0.4770             1.1566             2.3233           192.1835
     27.348699467830      3.919031425440                  baR*<            7263            12.8264          8737.0615             0.6568             3.0547             2.7469           183.8542
     26.758632433553      2.510344893538                  baR*L            9207            13.1685          8549.1723             0.2292             0.8640             2.2228           182.6376
     26.496619154155      6.648896321170                 baR*R<          117774            16.8457          8469.2672             0.3080             1.5872             2.5344            80.1520
     26.496026478609      5.434935155243                baR\CC-         1047573            19.9986          8472.2311             0.4434             2.0189             2.5169            84.4447
     26.430899044746      0.675913421646                PbL*aC-         1652833            20.6565          8452.1133             0.3054             0.8968             2.6894            82.0209
     25.659377118312     11.761357834291                baR*RR<         1773333            20.7580          8206.0993             0.1648             0.7011             2.5046            83.1005
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
68.16 21.56 tan(-0.999995461249+exp(((x0/cos(x1))-x0)))
79.05 20.8 tan(-1.006165943256*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sin/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     26.943170583786     -3.003937062001                      P               1             0.0000          8621.8146             0.3393             0.8622             2.2465           320.0000
     26.189278033822     -0.211168485670                      b               3             1.5850          8382.1539             0.1497             0.3757             2.2175           320.0000
     26.189278033822     -1.211168485670                     b>               6             2.5850          8383.1539             0.1497             0.3757             2.2175           309.5000
     25.068108658635     -0.013163168761                    bb*              48             5.5850          8027.3797             0.1194             0.3403             2.6090           261.7500
     25.006144272520     -0.009004539123                   bbS*             444             8.7944          8010.7606             0.1366             0.4007             2.8523           195.2140
     24.963166617101      0.918117090946                   bCEC            2976            11.5392          7999.7525             0.1572             0.4702             2.8505           186.4711
     24.943506608230     -1.713561531664                   bCCE            3408            11.7347          7993.6568             0.1824             0.5249             3.0083           182.5640
     24.917148767690     -0.004084483597                  bb>L*            5205            12.3457          7985.8333             0.1712             0.4983             2.9956           179.8035
     24.657956441694     -3.144343410088                  PbCR/            6472            12.6600          7903.2061             0.1145             0.3493             3.0359           177.9013
     24.496374341010      0.021747494454                  ab\E/            6770            12.7249          7851.5647             0.1863             0.5835             2.9873           175.8951
     24.396257713755     -0.007299025528                 bbaS**           42879            15.3880          7822.1905             0.1098             0.3863             2.8353           157.5186
     24.067233998301      0.009699017861                 abC\<*           64658            15.9805          7717.4954             0.0937             0.4721             2.5990           149.4938
     23.964141874479      0.012753811501                 ab\E</           78158            16.2541          7684.7795             0.1152             0.4580             2.7330           140.4350
     23.097566502060     -0.997949716581                 baR*C\          124254            16.9229          7408.1442             0.1594             1.4668             3.2758           122.4721
     22.914385392936      0.839554229815                bba**<S          730515            19.4786          7352.0819             0.0888             0.6717             3.2661            88.4282
     21.167857674635     -0.999974598175                abC\<*E         1339193            20.3529          6794.0674             0.1627             1.4965             4.8374            81.5146
     21.167857674635     -0.999974598175                abC/a-E         1697699            20.6952          6794.4096             0.1627             1.4965             4.8374            80.4521
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sin/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.99984246519689168        9.9984251268686055E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     26.943170583786      0.043817162299                      P               1             0.0000          8621.8146             0.3393             0.8622             2.2465           320.0000
     26.018116663480      0.313037018695                      b               3             1.5850          8327.3823             0.2753             0.7354             2.4742           320.0000
     25.939231116178      0.278644982857                    ba*              45             5.4919          8306.0458             0.2429             0.6868             2.4408           317.2000
     24.739968656762      0.765938997720                    bb*              48             5.5850          7922.3749             0.1597             0.4751             3.1652           317.3750
     24.653151478484     -1.505105938963                    bCL             276             8.1085          7897.1170             0.1373             0.4230             3.2177           250.7717
     23.737270562541      0.594590592440                  bba**            3621            11.8222          7607.7488             0.1321             0.4784             3.1350           231.7363
     23.383156479559     -1.144718723068                  abCL*            5258            12.3603          7494.9704             0.1108             0.4263             3.1593           209.1027
     22.639427746517     -1.078622213594                 aabC/-           44369            15.4373          7260.0541             0.0828             0.5537             3.2672           127.6682
     22.625478650609      1.077705106429                 abC\<*           64658            15.9805          7256.1337             0.0830             0.5526             3.2917           124.0141
     21.801321064006      0.474992896485                babE<**          536580            19.0334          6995.4562             0.0848             0.4968             4.0662           103.2701
     21.801321064006      0.474992896485                abbE<**          536582            19.0334          6995.4562             0.0848             0.4968             4.0662           103.2708
     20.543075496767     -1.011669718760                abCL\>/         1065413            20.0230          6593.8071             0.0986             1.0257             3.9927           106.4517
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.84 25.05 asin(-0.013163168761+(x1*x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.32 25.01 asin(-0.009004539123+(x1*sin(x1)))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
61.94 21.65 asin(0.474992896485*(x1*(x0*(exp(x1)-1))))
68.16 20.64 asin(-0.999974598175+exp(((x0/cos(x1))-x0)))
79.05 20.12 asin(-1.011669718760*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sqrt/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     27.401020946970     -2.769982501649                      P               1             0.0000          8768.3267             0.3559             1.1668             2.1561           320.0000
     25.505856795649     -0.029676472922                      b               3             1.5850          8163.4591             0.1502             0.6767             2.5041           320.0000
     25.497486370992     -0.022379280878                     bS              21             4.3923          8163.5880             0.1784             0.7828             2.7141           238.3810
     25.497486370991     -1.022379280878                    bS>              84             6.3923          8165.5880             0.1784             0.7828             2.7141           219.0357
     24.755802350858     -0.072077509431                   baR*             432             8.7549          7930.6116             0.0831             0.3613             2.3121           203.5903
     24.709110012518      0.120381632405                  bba**            3621            11.8222          7918.7374             0.0744             0.2589             2.3031           120.5628
     24.573809990795      0.131033436373                 babS**           42885            15.3882          7879.0074             0.0734             0.3187             2.4275           101.6038
     23.785126480658      0.054655819726                 bba*R*           46848            15.5157          7626.7562             0.0590             0.3043             2.2419           101.8875
     23.568509658323     -0.992382805090                bPa>//E          629907            19.2648          7561.1879             0.0814             0.3385             2.9477            60.6678
     23.545482988703     -0.998326931967                ba\SC*E         1342971            20.3570          7554.9116             0.0785             0.3386             2.7808            71.5687
     23.541984853234     -1.000677726935                baR>L*E         1343304            20.3574          7553.7925             0.0750             0.3556             2.6725            71.5736
     23.150058420867      0.007892521399                a>Pb/</         2489819            21.2476          7429.2663             0.0877             0.3614             3.0282            66.3542
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sqrt/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   1.5384498366862664        1.5384499097587127E-003
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     27.401020946970      0.118287209705                      P               1             0.0000          8768.3267             0.3559             1.1668             2.1561           320.0000
     27.387193542846      0.344386295282                      a               2             1.0000          8764.9019             0.3380             0.8622             2.3367           320.0000
     25.463024688299      0.882328926147                      b               3             1.5850          8149.7529             0.1709             0.7519             2.5879           320.0000
     25.463024688299      2.771918149568                    bP/              60             5.9069          8154.0748             0.1709             0.7519             2.5879           246.0667
     25.442529516621      0.720654804724                    bE<             120             6.9069          8148.5163             0.1190             0.5016             2.2702           241.3583
     24.613370320212      0.381238619547                   ba>*             396             8.6294          7884.9079             0.1390             0.5312             2.5982           222.3283
     24.594810959891      0.775166034698                   baR*             432             8.7549          7879.0944             0.1424             0.5701             2.5799           219.5648
     24.046692951451      0.534576035097                  bba+*            3594            11.8114          7706.7531             0.0528             0.2121             2.3826           137.2844
     23.338030463852      0.323318180469                 bba>+*           42501            15.3752          7483.5450             0.0899             0.4273             2.9206            98.6935
     23.338030463852      0.323318180469                 bab>+*           42507            15.3754          7483.5452             0.0899             0.4273             2.9206            98.7023
     23.329132989905      0.310177136252                 a>bE<*          189473            17.5316          7482.8542             0.0501             0.2386             2.4753            93.8893
     23.178930128131      0.339329880057                babE<*+          527832            19.0097          7436.2674             0.0807             0.3188             3.2045            70.1400
     23.148207827362      0.245999966466                bbaRE+*          535980            19.0318          7426.4583             0.1022             0.4524             3.2809            70.8772
     22.021449332028      0.343461398567                ba>bC/*          762417            19.5402          7066.4040             0.0259             0.1294             2.6368            81.9392
     21.674846530188      0.698786239618                baRbC/*          762453            19.5403          6955.4912             0.0262             0.1490             2.5365            81.9390
     21.540449196533      0.704411422342               baRbSC/*        10781019            23.3620          6916.3057             0.0631             0.3031             3.6437            35.8437
     21.495591455988      1.913802883569               baRbCE/*        10785636            23.3626          6901.9519             0.0530             0.2629             3.5300            35.8569
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.84 25.05 asin(-0.013163168761+(x1*x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.32 25.01 asin(-0.009004539123+(x1*sin(x1)))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
61.94 21.65 asin(0.474992896485*(x1*(x0*(exp(x1)-1))))
68.16 20.64 asin(-0.999974598175+exp(((x0/cos(x1))-x0)))
79.05 20.12 asin(-1.011669718760*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.503652667866     -3.122522741225                      P               1             0.0000          8161.1689             0.7772             5.5828             3.0578           320.0000
     25.503652667866    -23.121624656015                     PE              28             4.8074          8165.9762             0.7772             5.5828             3.0578           272.4286
     25.503652659911    666.000000000000                    PS\             163             7.3487          8168.5176             0.7772             5.5828             3.0578           254.5276
     25.428859429087     -0.559281798174                    bCC             249             7.9600          8145.1950             0.7033             5.3521             2.9737           254.0241
     24.757338468379      0.249746445718                   bbR-             516             9.0112          7931.3595             0.7212             5.4048             3.4714           230.1163
     24.489385011609      0.003780718394                   bbS-             525             9.0362          7845.6394             0.7476             5.4846             3.6398           230.4495
     24.285540411764     -1.003120319156                   bbS/             606             9.2432          7780.6161             0.7382             5.4591             3.8043           224.7442
     24.175460174783     -0.501348231808                   bC>\            2031            10.9880          7747.1352             0.7478             5.4891             3.9122           207.2629
     23.791590015144     -0.000699359135                  bbSS-            5817            12.5061          7625.8149             0.7251             5.4130             4.1997           190.2938
     23.322691852462      1.000193621472                  bb*C~           11046            13.4312          7476.6926             0.6974             5.3022             4.5909           183.1261
     23.278329887625     -0.999846654552                  bb*C\           11370            13.4729          7462.5385             0.6697             5.1741             4.5828           183.0363
     23.165062214767      0.841418681474                 PbC*CS          130105            16.9893          7429.8092             0.6560             5.1426             4.8867           163.3424
     22.963724194567     -0.367854358284                 PbC/CE          139015            17.0849          7365.4766             0.5638             4.6413             4.9461           163.6310
     22.960053149815      0.911741535564                 bb*CEC          171669            17.3893          7364.6063             0.6517             5.1196             5.1597           164.9185
     22.876527120122      0.000035149450                aPb/ER/          666419            19.3461          7339.8347             0.6952             5.2647             5.1941           164.0246
     22.811363129674      0.999618963726                bba**C~          721011            19.4597          7319.0959             0.5760             4.6124             4.3765           163.6604
     22.265897462031     -0.540368627410                bba**CC          736563            19.4904          7144.5776             0.6586             5.1423             4.9537           163.0535
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   5.6018743082184104        5.6018745742931622E-003
         113  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.386400729286      0.005721503388                      P               1             0.0000          5254.9850             0.6723             4.0586             3.1279           207.0000
     25.299979035661      0.017093080125                      a               2             1.0000          5238.0957             0.6689             4.0427             3.2665           207.0000
     24.770785696138      0.040041647858                      b               3             1.5850          5129.1376             0.6665             4.0418             3.4886           207.0000
     24.081415991066      0.001847738052                     a<               8             3.0000          4987.8531             0.6789             4.0748             4.4139           207.0000
     24.049667676205      0.003831596459                    aR<             107             6.7415          4985.0227             0.6790             4.0750             4.4923           199.2991
     23.947492268327      0.000299110999                    aES             227             7.8265          4964.9574             0.6794             4.0763             4.5778           193.4053
     23.736675810911      0.000693708755                    b>C             231             7.8517          4921.3436             0.6794             4.0768             4.9071           193.6407
     23.669537514751     -0.000043839101                   bb<+             327             8.3531          4907.9474             0.6794             4.0766             5.0509           190.1162
     23.307022707523      1.207487441406                   bbS-             525             9.0362          4833.5899             0.6376             3.9495             4.6003           195.3067
     23.301226477920     -0.389862091082                  bbCL*            5259            12.3606          4835.7145             0.6316             3.9285             4.5645           183.5824
     23.295324604566      0.234448440090                  ab\E/            6770            12.7249          4834.8571             0.6378             3.9297             4.8509           183.5708
     23.171970628397      0.752989863250                  bb\E/            6771            12.7252          4809.3231             0.6107             3.8697             5.0292           183.5742
     23.166402244742      0.232930591879                  PbL*E            9559            13.2226          4808.6679             0.6308             3.9269             4.7179           184.2920
     22.831155442980     -1.135985230830                  bb*C<           10722            13.3883          4739.4375             0.5848             3.7681             5.1499           185.1876
     22.773431908733     -1.124613089207                  bb*CL           12666            13.6287          4727.7291             0.5729             3.7203             5.1731           182.3671
     22.773155792014     -4.120980926006                  bCLC<           25683            14.6485          4728.6918             0.5648             3.6888             5.1719           183.4471
     22.769562767365     -1.187099859300                 bbS*CL          135930            17.0525          4730.3520             0.5920             3.7937             5.2467           174.2981
     22.768172678085     -4.234577550165                 bCLSC<          377061            18.5244          4731.5362             0.5678             3.7025             5.2044           172.8678
     22.757249924770     -4.139722974756                 bCLSCL          495159            18.9175          4729.6683             0.5659             3.6937             5.1862           164.4947
     22.263529594616     -0.109463631423                aPb\E-/          557825            19.0895          4627.6401             8.7315            88.5642             5.2903           164.9781
     22.079627190687     -0.891277693321                abb*C<*          645743            19.3006          4589.7834             0.5610             3.5973             5.3858           167.8386
     22.049107435392     -0.880520210487                abb*CL*          651575            19.3136          4583.4788             0.5460             3.5242             5.3287           167.8294
     21.804678722118     -0.731883164637                bba**C<          717123            19.4519          4533.0204             0.5321             3.4004             5.2548           168.8051
     21.667641884228     -0.708519335865                bba**CL          740451            19.4980          4504.6999             0.4300             2.2521             5.2353           168.6741
     21.502622220372     -2.684165075766                abCL*C<         1437932            20.4556          4471.4984             0.4873             3.1315             5.3381           166.8854
     21.436731752692     -2.653178739745                abCL*CL         1595396            20.6055          4458.0090             0.4625             2.9251             5.3571           165.1191
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.84 25.05 asin(-0.013163168761+(x1*x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.32 25.01 asin(-0.009004539123+(x1*sin(x1)))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
61.94 21.65 asin(0.474992896485*(x1*(x0*(exp(x1)-1))))
68.16 20.64 asin(-0.999974598175+exp(((x0/cos(x1))-x0)))
79.05 20.12 asin(-1.011669718760*(x0/((log(cos(x1)))**(-1)+1)))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_tan/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     27.150583472356     -3.022209031411                      P               1             0.0000          8688.1867             3.8730            56.4501             2.8106           320.0000
     26.726142949361     -0.212154740469                      b               3             1.5850          8553.9507             3.8788            56.9738             2.8934           320.0000
     26.726142949361     -1.212154740469                     b>               6             2.5850          8554.9507             3.8788            56.9738             2.8934           309.5000
     26.710213019026     -0.202574191989                     bS              21             4.3923          8551.6605             3.8762            56.8829             2.8823           301.9048
     25.718017244507     -0.012851569537                    bb*              48             5.5850          8235.3505             3.8812            57.0492             3.3733           289.6458
     25.700284601034     -0.412198764797                    b<E             288             8.1699          8232.2610             3.8746            56.7837             3.4446           259.7986
     25.644997546688     -0.010808376024                   bbS*             444             8.7944          8215.1936             3.8785            56.9653             3.4296           256.6396
     25.464384720726      0.917492648664                   bCEC            2976            11.5392          8160.1423             3.8773            56.8993             3.5596           242.9395
     25.412501100907      0.618533238338                   bCCL            3165            11.6280          8143.6283             3.8735            56.7166             3.7199           238.1096
     25.278585816500     -1.715201149494                   bCCE            3408            11.7347          8100.8822             3.8754            56.8242             3.8099           237.4278
     24.895715563048      0.020459819654                  ab\E/            6770            12.7249          7979.3539             3.8820            56.8824             3.8549           227.9422
     24.852197657958      0.009360917117                 abC\<*           64658            15.9805          7968.6838             3.8968            57.2366             3.5680           197.8083
     24.607024158769      0.013575110782                 ab\E</           78158            16.2541          7890.5018             3.8902            57.1148             3.6718           192.2450
     24.578690208130     -0.992858956764                 baR*C\          124254            16.9229          7882.1038             3.9281            57.6255             3.6658           180.1496
     24.314852500221     -0.003448114219                bba>L**          537816            19.0368          7799.7896             3.8862            57.0565             4.0438           162.0387
     23.534508366861      0.840346648082                bba**<S          730515            19.4786          7550.5212             3.9055            57.4193             4.4908           160.5974
     23.534508366861      0.840346648082                abb**<S          730523            19.4786          7550.5212             3.9055            57.4193             4.4908           160.5977
     22.879629934326     -0.999764587280                abCL*>\         1472924            20.4903          7341.9718             4.1187            58.9131             4.5837           148.7354
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_tan/kinetic.txt_train
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       2
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pab
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   56.330736285732264        5.6330738961298671E-002
         102  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     27.077942158573      0.038733655682                      P               1             0.0000          5902.9914             4.4234            56.4524             2.9454           218.0000
     27.012085598344      0.117566513139                      a               2             1.0000          5889.6347             4.4253            56.5318             3.1207           218.0000
     26.345006599586      0.292043316683                      b               3             1.5850          5744.7964             4.4239            56.5805             3.0946           218.0000
     26.133808612847      0.264725230313                    ba*              45             5.4919          5702.6621             4.4283            56.7179             3.2705           218.0000
     25.207529734726      0.742722576615                    bb*              48             5.5850          5500.8264             4.4296            56.8739             3.7880           218.0000
     25.195067781546     -1.514664413917                    bC<             114             6.8329          5499.3577             4.4289            56.8517             3.8242           210.3860
     25.168497193785     -1.470066509406                    bCL             276             8.1085          5494.8409             4.4319            56.9503             3.8151           199.9529
     25.150334675822      0.758008350209                   bbS*             444             8.7944          5491.5674             4.4281            56.8200             3.8671           203.4347
     24.234041700481      0.593529932520                  bba**            3621            11.8222          5294.8433             4.4386            57.0731             4.0392           191.1740
     24.013384759413     -1.151532523695                  abCL*            5258            12.3603          5247.2782             4.4420            57.1608             4.0930           193.3779
     23.341760257125     -0.210749074475                 babL/*           43425            15.4062          5103.9100             4.5072            58.3012             3.6950           180.2926
     22.853392635831      0.479083927342                babE<**          536580            19.0334          5001.0730             4.4465            57.2780             4.8217           114.1067
     22.000510889304      0.482192315126                abb*\</          662915            19.3385          4815.4498             4.5253            58.5758             4.4918           125.3157
     22.000510889304      0.482192315126                ab\b/</          808616            19.6251          4815.7365             4.5253            58.5758             4.4918           123.6506
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
29.14 27.1 sqrt(0.003780718394+(x1-sin(x1)))
43.65 26.98 tan(-3.004366480425+pi)
46.25 26.41 -0.209122000000+x1
46.37 25.28 -0.011230029716+(x1*x1)
47.66 25.21 -0.008691881572+(x1*sin(x1))
49.84 25.05 asin(-0.013163168761+(x1*x1))
49.92 25.02 tan(-0.013883609362+(x1*x1))
51.32 25.01 asin(-0.009004539123+(x1*sin(x1)))
51.54 25.0 tan(-0.010493432352+(x1*sin(x1)))
52.49 24.96 0.779464412373*(x1*x1)
54.62 24.68 0.022101394231+(x0/exp((x1)**(-1)))
55.36 24.03 0.600882381349*(x1*(x1*x0))
58.05 22.32 0.477987669603*(x1*(x0*(exp(x1)-1)))
61.94 21.91 tan(0.474068046101*(x1*(x0*(exp(x1)-1))))
61.94 21.65 asin(0.474992896485*(x1*(x0*(exp(x1)-1))))
68.16 20.64 asin(-0.999974598175+exp(((x0/cos(x1))-x0)))
79.05 20.12 asin(-1.011669718760*(x0/((log(cos(x1)))**(-1)+1)))

NN already trained 

NN loss:  tensor(0.0006, grad_fn=<DivBackward0>) 

Checking for symmetries...

Checking for separabilities...

Checking for compositionality...

Checking for generalized symmetry...

Multiplicative separability found for variables: (0,) [1]
Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/separable_mult/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.176087432709     -2.975826978683                      P               1             0.0000          8056.3480             0.0582             0.0987             2.0636           320.0000
     24.488193020617     -0.893254475883                    aRR             118             6.8826          7843.1044             0.0458             0.1163             2.0506           218.7542
     23.880143527107     -0.729383678176                    aRS             136             7.0875          7648.7334             0.0502             0.1428             2.3351           214.3750
     22.820817001095      0.006013621327                   aP-E             480             8.9069          7311.5683             0.0183             0.0576             2.1037           176.9417
     21.660950437955     -0.188376370531                   aRP/             604             9.2384          6940.7425             0.0096             0.0287             2.1111           154.8593
     21.113463215448     -1.056903311213                   a>RR            1352            10.4009          6766.7091             0.0054             0.0159             2.0799            94.3092
     19.923399657618     -0.003873556081                  aPLL*            2822            11.4625          6386.9504             0.0013             0.0023             1.6071            64.2434
     19.746687046586     -1.016344550100                  aP/>R            5526            12.4320          6331.3719             0.0020             0.0057             2.0136            42.6448
     19.731583359997     -0.003354236729                 aPLLS*           32668            14.9956          6329.1023             0.0012             0.0020             1.5802            25.1698
     16.603570980756     -0.000373566870                 aP<<L*           33076            15.0135          5328.1562             0.0002             0.0006             2.4361            25.0547
     16.186184247675      0.000052242575                aP<<LS*          419386            18.6779          5198.2569             0.0002             0.0010             1.8321            13.5726
     16.100559431390     -0.000065453019               aPPR*>>/         3628504            21.7909          5173.9700             0.0002             0.0009             1.9795             9.9995
     16.082166780801     -0.000121747890              aPPR<RE*/        41492610            25.3064          5171.5997             0.0002             0.0009             2.1087             9.4162
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/separable_mult/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.26320070028305054        2.6320071278441298E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.176087432709      0.052764879472                      P               1             0.0000          8056.3480             0.0582             0.0987             2.0636           320.0000
     16.173871611559      0.132079837820                      a               2             1.0000          5176.6389             0.0002             0.0009             1.8623           320.0000
     16.173871611559      0.031891073333                   aP>*             236             7.8826          5183.5216             0.0002             0.0009             1.8623            33.2161
     16.173871611559      0.414941059730                   aP\*             248             7.9542          5183.5931             0.0002             0.0009             1.8623            37.2540
     16.173726365283      0.132079830938                   aPS-             292             8.1898          5183.7823             0.0002             0.0009             1.8630            41.0822
     16.135347580788      3.058574252316                  aPE/S            4374            12.0947          5175.4060             0.0002             0.0011             2.0905            34.3690
     16.124197167244      0.132109163877                 aPS~R-           35072            15.0980          5174.8411             0.0002             0.0009             1.9678            29.1628
     16.110784142059      0.132121237876                aPP+SR-          309150            18.2379          5173.6889             0.0002             0.0009             1.9672            21.0900
     16.090740260488      0.132177474361                aPE\C<+          381254            18.5404          5167.5773             0.0002             0.0009             2.0906            23.0309
     16.090740260488      0.132177474361                aPE\C+<          494978            18.9170          5167.9539             0.0002             0.0009             2.0906            27.3890
     16.070101902139      0.132206747603               aPPP*-E-         3248416            21.6313          5164.0639             0.0002             0.0008             2.3461            17.4600
     16.059295824208      0.132176291118               aPPS~R*-         3324528            21.6647          5160.6394             0.0002             0.0009             2.2167            18.0756
     16.015642512574     -0.000026540308               PaP<EE*-         3327521            21.6660          5146.6716             0.0002             0.0009             2.1887            18.1003
     16.006878926444      0.132144102682               aPP<EE/-         3339184            21.6711          5143.8723             0.0002             0.0009             2.2193            18.1480
     15.999674490298      0.132144231096               aPEP~/E-         4466584            22.0907          5141.9866             0.0002             0.0009             2.2524            20.5916
     15.999674490298      0.000083574428               aPEP/E*<         4701736            22.1648          5142.0606             0.0002             0.0009             2.2524            21.0918
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
44.26 25.18 0.052764879472*pi
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     23.556773918980     -3.114114453052                      P               1             0.0000          7538.1677             0.0194             0.0418             2.0001           320.0000
     23.517711071261     -1.519869926577                   aaC+             226             7.8202          7533.4877             0.0452             0.1429             2.4297           168.4292
     20.818891539882     -0.024274019231                   aPE/             340             8.4094          6670.4547             0.0031             0.0077             1.8435           158.2235
     20.818891539882     -0.024274019231                  aPE\*            2682            11.3891          6673.4344             0.0031             0.0077             1.8435            50.8542
     20.785498728627     -0.026827214072                  aPE</            3258            11.6698          6663.0294             0.0033             0.0084             1.9041            47.3088
     20.741543088543     -1.025919695757                  aPE/E            4806            12.2306          6649.5244             0.0031             0.0082             1.8465            42.9230
     20.703264131922     -0.519438242611                  aRLCC           19976            14.2860          6639.3305             0.0189             0.0634             3.4475            37.6823
     20.036149148186     -0.170277718889                 PPa-+\           25951            14.6635          6426.2312             0.0023             0.0069             2.0861            51.7420
     19.479473254607     -0.910826776434                 aP/C>S           74040            16.1760          6249.6075             0.0022             0.0078             2.0957            37.9207
     19.123045148562     -0.318049993223                PaP/C*\          316983            18.2740          6137.6485             0.0024             0.0072             2.3872            31.7360
     18.569140506088     -1.787878840860                PaP-E+R          317903            18.2782          5960.4032             0.0007             0.0020             1.8494            31.7479
     17.686617276317     -1.143979127009                aaP/S/L          322136            18.2973          5678.0148             0.0004             0.0010             2.2588            31.5492
     16.880632049702     -0.540826539073                aPER/CC          675482            19.3656          5421.1678             0.0003             0.0011             1.9817            23.7326
     15.270167681538     -0.156121793373                aP/C>RC          977162            19.8982          4906.3519             0.0001             0.0007             2.1848            19.8761
     15.270167681538     -0.156121793373               aP\*C>RC        10663424            23.3462          4909.7998             0.0001             0.0007             2.1848            10.4674
     15.270167681537      0.843878206627               aP/C>RC<        12136316            23.5328          4909.9865             0.0001             0.0007             2.1848            10.3874
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   6.9274608629488199E-002   6.9274611919855554E-005
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     23.556773918980      0.008746610470                      P               1             0.0000          7538.1677             0.0194             0.0418             2.0001           320.0000
     22.466679533978      0.021900208670                      a               2             1.0000          7190.3375             0.0103             0.0258             1.9807           320.0000
     22.071759222412      0.095597561906                     aL              18             4.1699          7067.1329             0.0263             0.0693             3.2470           305.8889
     22.065327239894      0.007835712221                     aE              20             4.3219          7065.2266             0.0065             0.0122             1.9158           307.3000
     14.464047223487      0.017445083559                    aa*              28             4.8074          4633.3025             0.0001             0.0005             1.8850           301.9286
     14.464047223487      0.017445083559                   aa\/             322             8.3309          4636.8260             0.0001             0.0005             1.8850            38.6211
     14.464047223487      0.005552942407                  aaP**            2132            11.0580          4639.5531             0.0001             0.0005             1.8850            14.8058
     14.464047223487      0.005552942407                  Paa**            2135            11.0600          4639.5551             0.0001             0.0005             1.8850            15.0927
     14.464047223487      0.054805347874                  aPa//            2214            11.1124          4639.6076             0.0001             0.0005             1.8850            15.2358
     14.464047223487      0.004212167794                 aaP>**           23606            14.5269          4643.0220             0.0001             0.0005             1.8850            10.6195
     14.463975159139      0.017445082650                 aaPS-*           23718            14.5337          4643.0057             0.0001             0.0005             1.8854            10.7918
     14.438022197238    -18.690562420871                 aPE/C<           54632            15.7375          4635.9046             0.0001             0.0005             1.9198            11.7337
     14.396073419968    -18.671461924917                 aPE/CL           62408            15.9294          4622.6729             0.0001             0.0004             2.1112            11.7431
     14.396073419967    -18.671461924917                aPE\*CL          686462            19.3888          4626.1323             0.0001             0.0004             2.1112            13.6840
     14.393104652825     18.671451253669                aPE/CL~          766058            19.5471          4625.3406             0.0001             0.0004             2.1239            13.8026
     14.386672438506    -18.671471714261                aPE/CLS          801050            19.6115          4623.3467             0.0001             0.0004             2.1578            13.7244
     14.385612068718     -9.205154755523               aPS~L/CL         8054116            22.9413          4626.3372             0.0001             0.0004             2.4740            13.3642
     14.363832966072     -5.051408857545               aP<E/CR<         8623584            23.0399          4619.4664             0.0001             0.0004             2.4058            13.4732
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_acos/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.215649332370     -1.738405162025                      P               1             0.0000          8069.0078             0.0591             0.1005             1.9900           320.0000
     25.215649332370    -21.737507076815                     PE              19             4.2479          8073.2557             0.0591             0.1005             1.9900           222.7895
     24.013800477511      0.960744739812                    a>\              92             6.5236          7690.9397             0.0442             0.1204             2.2081           211.2717
     22.173213319966      0.488945797246                   aP/C             452             8.8202          7104.2484             0.0099             0.0278             2.0092           174.1792
     22.173213319966      1.488945797246                  aP/C<            5190            12.3415          7107.7698             0.0099             0.0278             2.0092            55.4738
     21.838103078633      0.539311492288                  aP+RS            5722            12.4823          7000.6753             0.0084             0.0214             2.0448            54.9708
     21.592831952245      1.757593158445                  aRP~/            7286            12.8309          6922.5371             0.0090             0.0271             2.2142            52.3131
     20.425712928185      1.264441828618                  aRCP/            9914            13.2753          6549.5034             0.0036             0.0112             2.1065            49.8087
     18.550655796989      1.573626459219                 aPLL~*           31696            14.9520          5951.1619             0.0006             0.0013             1.7038            31.9481
     18.350062509218      0.978429004292                 aE>>R\          196618            17.5850          5889.6050             0.0009             0.0026             1.9185            15.6167
     18.350062509218      0.978429004292                 aE>>\R          208282            17.6682          5889.6882             0.0009             0.0026             1.9185            15.3376
     17.712531414933      1.573121390237                aPLLS~*          410230            18.6461          5686.6561             0.0005             0.0011             2.6678            13.8467
     17.306423241618      1.571236758037                aP<E~>/          455926            18.7984          5556.8539             0.0006             0.0025             2.3869            14.1360
     17.206437242220      1.571486763661               aPRRR\<*         5527956            22.3983          5528.4582             0.0005             0.0023             2.2578            13.0132
     17.206437242219      1.571486763661               aPRR\R<*         5530548            22.3990          5528.4589             0.0005             0.0023             2.2578            13.0118
     17.025343604178     -2.318136464178               PPER*a-R         8324739            22.9890          5471.0989             0.0002             0.0005             1.9889            12.3666
     16.768949372046     -2.323789610364               PP/EEa-R        11818683            23.4946          5389.5584             0.0002             0.0006             1.9915            11.8682
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_acos/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   1.5036736329875475        1.5036737044082126E-003
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.215649332370      0.446648466133                      P               1             0.0000          8069.0078             0.0591             0.1005             1.9900           320.0000
     25.196778452896     -0.446990420683                     P~               7             2.8074          8065.7765             0.0590             0.0998             2.0646           219.8571
     25.196778452896     -1.226718935306                    PL~              87             6.4429          8069.4120             0.0590             0.0998             2.0646           196.5862
     24.552457333474      0.356538942315                   Pa\+             213             7.7347          7864.5211             0.1025             0.3188             2.4885           190.4977
     24.255860907106     -0.064162591862                   aPE-             304             8.2479          7770.1234             0.0308             0.0529             2.0339           186.8191
     23.421763963261      1.524217157245                   aP/C             452             8.8202          7503.7846             0.0282             0.0747             2.2003           170.1659
     23.393991263096      1.491042295463                   aS>S            1452            10.5038          7496.5810             0.0288             0.0991             2.2074           142.4125
     23.036584726808     -0.163033404785                  aPP*-            2162            11.0782          7382.7853             0.0128             0.0226             1.8759           137.1369
     23.016603276686      0.512091676256                  PaP/-            2179            11.0894          7376.4025             0.0127             0.0224             1.9539           136.6397
     22.778567848019      0.407056516256                  PaE\+            2359            11.2040          7300.3457             0.0117             0.0302             1.8542           131.9987
     22.548421417368      0.362763263024                  Pa\S+            2411            11.2354          7226.7303             0.0103             0.0298             1.8423           130.5106
     22.154315794498      0.671476707358                  PaRR-            3027            11.5637          7100.9447             0.0125             0.0391             2.0783           112.0816
     22.153967811861     -0.671570133104                  aRRP-            9554            13.2219          7102.4916             0.0125             0.0393             2.0523            63.6581
     21.521054450756      1.445982399541                  aE\ES           18778            14.1968          6900.9342             0.0296             0.1044             3.7033            53.3010
     17.888408497567      1.529098749941                  a>RLC           20076            14.2932          5738.5839             0.0020             0.0067             2.9738            55.8029
     17.888408497566      1.529098749941                 a>R\LC          240900            17.8781          5742.1688             0.0020             0.0067             2.9738            23.4791
     17.888408497565      1.529098749941                 a>\RLC          241044            17.8789          5742.1697             0.0020             0.0067             2.9738            23.4775
     17.319526294285     -0.133840636333                aP<R>E-          452218            18.7867          5561.0351             0.0004             0.0017             1.9239            21.6759
     16.921468740317      2.216463095039                aP/E>R\          942202            19.8457          5434.7157             0.0004             0.0013             2.0372            15.8730
     16.921468740317      2.216463095039                aP/E>\R          952570            19.8615          5434.7315             0.0004             0.0013             2.0372            15.7980
     16.921468740317      0.705522095880               PaP/E>R/         3965065            21.9189          5436.7889             0.0004             0.0013             2.0372            11.6208
     16.921453292933     -2.216463313354               aP/E>R\~        12206332            23.5411          5438.4062             0.0004             0.0013             2.0374            10.5222
     16.921453292933     -2.216463313354               aP/E>\R~        12216700            23.5424          5438.4074             0.0004             0.0013             2.0374            10.5209
     16.416527923598      1.568816466513               aRPRL*CR        16339720            23.9619          5277.2508             0.0002             0.0007             2.2660            10.4166
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_asin/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.196778452896     -2.975058275137                      P               1             0.0000          8062.9691             0.0590             0.0998             2.0646           320.0000
     24.446049079002     -0.892470813954                    aRR             118             6.8826          7829.6183             0.0452             0.1155             2.0533           219.2881
     23.909204362189     -0.726763214338                    aRS             136             7.0875          7658.0329             0.0490             0.1402             2.2986           214.3676
     22.833255960038      0.006253692853                   aP-E             480             8.9069          7315.5488             0.0173             0.0547             2.0651           177.3375
     21.580398697007     -0.186808445833                   aRP/             604             9.2384          6914.9660             0.0090             0.0271             2.2608           155.1474
     21.285182907967     -1.055524927236                   a>RR            1352            10.4009          6821.6594             0.0051             0.0146             1.9468            94.7337
     18.564826133399     -0.002847652873                  aPLL*            2822            11.4625          5952.2069             0.0006             0.0014             1.6788            64.3306
     17.714403773049     -0.002325120515                 aPLLS*           32668            14.9956          5683.6048             0.0005             0.0011             2.6629            16.8574
     17.314736113447     -0.000441684430                 aP<E</           37216            15.1836          5555.8992             0.0006             0.0025             2.3555            17.0874
     17.223135553163     -0.001888336735                aPLLSS*          418978            18.6765          5530.0799             0.0004             0.0014             2.3788            13.7072
     16.959331504521     -4.952656977502                PEaRE+R         1202735            20.1979          5447.1840             0.0005             0.0018             2.3183            13.4321
     16.859968885555     -0.131514662136               aRPRR>-E        15700144            23.9043          5419.0943             0.0002             0.0005             1.6371            11.9848
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_asin/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.26633838683262101        2.6633839948301559E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.196778452896      0.053009565404                      P               1             0.0000          8062.9691             0.0590             0.0998             2.0646           320.0000
     17.835759265822      0.132706292317                      a               2             1.0000          5708.4430             0.0008             0.0028             2.3295           320.0000
     17.835759265822      0.132706292317                    a><              56             5.8074          5713.2503             0.0008             0.0028             2.3295            69.6964
     17.835742211833      0.132706301357                   aPS+             220             7.7814          5715.2189             0.0008             0.0028             2.3295            38.8000
     17.835705682259      0.132706320716                 aPPS*+           23356            14.5115          5721.9373             0.0008             0.0028             2.3295            25.7884
     17.497473616771      0.134583087889                 aP>E\-           34944            15.0928          5614.2843             0.0004             0.0012             2.5056            34.1589
     16.793033213476      0.132531218259                 a<aR/E          103436            16.6584          5390.4290             0.0003             0.0008             2.0920            30.4852
     16.160122809136      0.174082981635                aaP>/S-          287736            18.1344          5189.3737             0.0002             0.0010             1.9387            23.2828
     16.079161111821      8.267023237417                aP>E/E<          619866            19.2416          5164.5732             0.0002             0.0012             2.2335            25.0891
     16.064151057537     -6.088356247500                aPE/RCL          822794            19.6502          5160.1785             0.0003             0.0013             2.3057            22.9599
     16.036927381281      0.131540330193               aaRP-EC/         4680914            22.1584          5153.9751             0.0002             0.0010             2.1327            20.1639
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_atan/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.136068916904     -2.977320747022                      P               1             0.0000          8043.5421             0.0566             0.0973             2.0619           320.0000
     25.136068916904    -22.976422661812                     PE              19             4.2479          8047.7900             0.0566             0.0973             2.0619           236.2105
     25.136068905718    666.000000000000                    PS\             101             6.6582          8050.2003             0.0566             0.0973             2.0619           219.4059
     24.562862006842     -0.894776750696                    aRR             118             6.8826          7866.9985             0.0470             0.1177             2.0463           217.1525
     23.869712068238     -0.732640754604                    aRS             136             7.0875          7645.3953             0.0518             0.1459             2.4605           212.9853
     22.871900524241      0.004214873007                   aP-E             480             8.9069          7327.9151             0.0196             0.0616             2.1570           178.4438
     21.646889168514     -0.191950614517                   aRP/             604             9.2384          6936.2429             0.0113             0.0321             2.3326           156.6622
     21.171517161636     -1.059463856465                   a>RR            1352            10.4009          6785.2864             0.0063             0.0184             2.0362            96.4164
     20.960994645448     -0.005395830894                  aPLL*            2822            11.4625          6718.9808             0.0030             0.0057             1.7399            65.2303
     20.802854756633     -1.018749363112                  aP/>R            5526            12.4320          6669.3455             0.0033             0.0080             1.8086            45.2917
     18.186769742987      0.005629116637                 aaPL/-           24094            14.5564          5834.3227             0.0012             0.0028             2.8932            28.9133
     18.186769742987      0.005629116637                aaP\L/+          273000            18.0585          5837.8249             0.0012             0.0028             2.8932            22.4110
     18.186769742962      0.005629116637                aaPL\*-          276632            18.0776          5837.8439             0.0012             0.0028             2.8932            22.3634
     16.976949481522     -9.871220058642                PaPE+L*          285567            18.1235          5450.7473             0.0002             0.0004             2.0212            22.3448
     16.346078359806      0.001508348216               aPPE>/*S         3512328            21.7440          5252.4891             0.0003             0.0007             2.3904            11.7187
     16.346078359806      0.001508348216               PaPE>/*S         3512329            21.7440          5252.4891             0.0003             0.0007             2.3904            11.7188
     16.346078359806      0.001508348216               aPE>P//S         5130280            22.2906          5253.0357             0.0003             0.0007             2.3904            11.6543
     16.346078359806      0.001508348216               PPE>a//S         5130603            22.2907          5253.0358             0.0003             0.0007             2.3904            11.6544
     16.051173327448     -0.134957976195               a>PLLS*S        15374624            23.8740          5160.2495             0.0002             0.0007             2.0147            11.2612
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_atan/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.25736374771559317        2.5736375993971525E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.136068916904      0.052289398255                      P               1             0.0000          8043.5421             0.0566             0.0973             2.0619           320.0000
     19.401259635728      0.130896005427                      a               2             1.0000          6209.4031             0.0012             0.0026             1.6802           320.0000
     19.371187527474     -0.130924857919                     a~               8             3.0000          6201.7800             0.0012             0.0027             1.7818           132.6250
     19.371180123706     -0.130924848796                   PSa-             587             9.1972          6207.9749             0.0012             0.0027             1.7818            56.0630
     19.127381009661      0.131398781717                   aLSE            2032            10.9887          6131.7506             0.0029             0.0098             2.6961            36.7736
     18.033071069058      0.126552430073                  aPE\+            2358            11.2033          5781.7861             0.0011             0.0028             2.8274            41.6268
     18.033071069058      0.005468825891                  aPE*>            3582            11.8066          5782.3893             0.0011             0.0028             2.8274            51.7113
     17.588938150238      0.099899030428                 aaP/S+           24582            14.5853          5643.0455             0.0003             0.0007             1.8029            37.9321
     17.441456663542      0.827624754131                 aPP+/S           26284            14.6819          5595.9480             0.0003             0.0006             1.6639            37.2072
     17.164404837072      0.128600721104                 aPRS<-           34204            15.0619          5507.6714             0.0005             0.0010             2.6122            34.7356
     17.015180248325     -0.660612219114                 aPRC*S           46552            15.5066          5460.3642             0.0003             0.0015             1.8249            35.2236
     16.718748583066      0.679941943009                 aP>>/S           46968            15.5194          5365.5189             0.0003             0.0012             1.7665            35.0482
     16.301510946674     -0.002122199195                aaP>E-*          274992            18.0690          5234.5525             0.0002             0.0006             1.8751            17.5035
     16.284988584457      8.392671350141                aaP>E+/          278880            18.0893          5229.2856             0.0002             0.0005             1.9179            17.5173
     16.097770841653      0.698254260573                aPP<+/S          297894            18.1844          5169.4711             0.0002             0.0011             2.1873            17.5356
     16.005072683947      0.734992858183                aPPR*/S          297990            18.1849          5139.8082             0.0002             0.0008             2.3628            17.5405
     16.005072683944      0.734992858183               PaPR//\S         3810665            21.8616          5143.4849             0.0002             0.0008             2.3628            16.1435
     15.999096321947     -0.727370402702               aPRCE<*S         6756960            22.6879          5142.3988             0.0002             0.0008             2.2341            18.0703
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_cos/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     22.576427199568     -2.155475802959                      P               1             0.0000          7224.4567             0.0096             0.0206             1.8814           320.0000
     22.576427199568     -1.155475802959                     P<               5             2.3219          7226.7786             0.0096             0.0206             1.8814           205.2000
     22.576427199568      4.127709679067                     P~               7             2.8074          7227.2641             0.0096             0.0206             1.8814           197.0000
     22.576427196448    666.000000000000                    PS\             101             6.6582          7231.1149             0.0096             0.0206             1.8814           172.8713
     22.576421209145      0.986117048456                   aPS*             256             8.0000          7232.4548             0.0096             0.0206             1.8814           154.2734
     22.554038150990      1.040512976112                  aPE~/            3294            11.6856          7228.9778             0.0099             0.0208             1.9709           133.5899
     21.697388554415      0.859346888997                  aa>E/            3480            11.7649          6954.9292             0.0079             0.0260             2.0033           131.5270
     21.605501877756      0.800980031044                  aP>+\            3946            11.9462          6925.7068             0.0072             0.0183             2.0502           129.6782
     20.635923072659      0.749653891027                  PaR+\            3963            11.9524          6615.4478             0.0038             0.0114             2.0716           129.7184
     20.213724524825     -0.000702448925                  aP-EC            5938            12.5358          6480.9276             0.0043             0.0154             2.1737           105.2991
     19.747035469842     -0.010593612041                  aLP/C            8516            13.0560          6332.1073             0.0094             0.0315             3.3972            89.5198
     18.902340357427     -0.005286788752                  a>\>S           17466            14.0923          6062.8412             0.0018             0.0073             2.1484           101.8637
     18.224672760359      0.000639385736                 aPLL*C           47896            15.5476          5847.4429             0.0004             0.0008             1.7086            54.6907
     18.069202214236     -0.002443520499                 PaR-RS           59477            15.8600          5798.0048             0.0004             0.0006             1.6648            47.1498
     17.484076549780     -0.005418496903                 aRRERS          224222            17.7746          5612.6791             0.0011             0.0042             2.5220            24.5770
     17.240877401942      0.714085388745                PPa-\+\          316593            18.2723          5535.3530             0.0005             0.0019             1.8733            25.1357
     14.742993854739      0.000048616210                aP<<L*C          556438            19.0859          4736.8439             0.0001             0.0001             2.3293            20.1457
     13.729869647749      0.648498419677               PaP/C+LL         4161129            21.9885          4415.5468             0.0000             0.0002             2.1727            11.2117
     13.466834466226     -0.000008241815               aP<<LS*C         6873084            22.7125          4332.0996             0.0000             0.0003             1.9243            10.1064
     13.376459125928      0.000008990884              aPPR*>>/C        47767194            25.5095          4305.9764             0.0000             0.0002             2.1461             6.6058
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_cos/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.99775149627906912        9.9775154366972215E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     22.576427199568      0.313890761581                      P               1             0.0000          7224.4567             0.0096             0.0206             1.8814           320.0000
     22.576427199568      0.238100894926                     P>               3             1.5850          7226.0417             0.0096             0.0206             1.8814           224.3333
     22.552974873538     -0.313946577168                     P~               7             2.8074          7219.7593             0.0096             0.0207             1.9630           194.7143
     22.552974873538   -666.000000000000                     PS              13             3.7004          7220.6524             0.0096             0.0207             1.9630           188.7692
     22.552974873538     -0.986292287897                     PC              15             3.9069          7220.8589             0.0096             0.0207             1.9630           189.2667
     22.552974873538     -0.238143233672                    P~<              59             5.8826          7222.8346             0.0096             0.0207             1.9630           156.7797
     22.552974873538     -1.172104862009                    P>S             127             6.9887          7223.9406             0.0096             0.0207             1.9630           160.2205
     22.552968945756     -0.000000086224                  aPS\+            2346            11.1960          7228.1461             0.0096             0.0207             1.9630           144.1633
     20.127497910819     -0.015994345507                  aP>E-            3154            11.6230          6452.4223             0.0031             0.0088             2.2091           134.5919
     19.751947032183      0.210579217885                  PEa-R            8211            13.0033          6333.6264             0.0016             0.0041             1.8127            82.5817
     19.597041905370      0.989194944493                  aLP/C            8516            13.0560          6284.1094             0.0094             0.0315             3.5614            80.7713
     18.922038761554      0.994636045440                  a>\>S           17466            14.0923          6069.1447             0.0019             0.0074             2.0390            96.8469
     18.244519383981      1.000648692592                 aPLL*C           47896            15.5476          5853.7938             0.0004             0.0008             1.7105            52.5555
     18.019170493712      0.997525636552                 PaR-RS           59477            15.8600          5781.9946             0.0004             0.0006             1.5740            45.3959
     17.325831234874      0.994484408639                 aRRERS          224222            17.7746          5562.0406             0.0012             0.0043             2.6197            23.6497
     15.995536689820      0.703542204734                PaP/C+L          321303            18.2936          5136.8653             0.0002             0.0006             3.0979            24.5149
     14.746862572863      1.000049035109                aP<<L*C          556438            19.0859          4738.0819             0.0001             0.0001             2.3393            21.6607
     13.464260659070      0.999991626946               aP<<LS*C         6873084            22.7125          4331.2759             0.0000             0.0003             1.9366            10.6327
     13.383856210672      1.000009082120              aPPR*>>/C        47767194            25.5095          4308.3435             0.0000             0.0002             2.1301             6.7225
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_exp/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.413312183838     -1.961296141598                      P               1             0.0000          8132.2599             0.0685             0.1208             2.0719           320.0000
     25.413312183838      4.321889340427                     P~               7             2.8074          8135.0673             0.0685             0.1208             2.0719           238.1429
     25.413312183838     -8.689308350968                    PP*              25             4.6439          8136.9038             0.0685             0.1208             2.0719           228.2800
     23.832451352467      0.121468016115                    aRR             118             6.8826          7633.2671             0.0381             0.1038             2.1280           224.9830
     23.808901931062      0.295505698226                    aRS             136             7.0875          7625.9361             0.0402             0.1202             2.2062           215.5956
     23.444687839307      0.630030337644                   aa>/             310             8.2761          7510.5762             0.0354             0.1027             2.2639           170.8871
     22.729017542904      1.018986736161                   aP-E             480             8.9069          7282.1925             0.0118             0.0327             1.9290           142.6146
     22.216998315375      0.829315130527                   aRP/             604             9.2384          7118.6779             0.0084             0.0232             1.8838           123.1291
     22.103747850493     -0.042313669249                   a>RR            1352            10.4009          7083.6002             0.0100             0.0289             1.9849            81.3587
     20.164122972894      0.981787228044                  aPP+/            2186            11.0941          6463.6134             0.0025             0.0068             2.0078            67.7566
     20.164122972893      0.981787228044                 aPP+\*           24780            14.5969          6467.1162             0.0025             0.0068             2.0078            27.0284
     20.133168276069      0.982627997660                 aP>S>*           30948            14.9176          6457.5314             0.0023             0.0063             1.9008            25.9741
     20.133161092043      0.982627914182                 aPCS>*           30972            14.9187          6457.5302             0.0023             0.0063             1.9008            25.9800
     19.740478268912      0.555120712583                 aP-ERR           73348            16.1625          6333.1155             0.0016             0.0034             1.8962            23.4048
     19.129428941769      0.637281758277                 aP/S<E           78056            16.2522          6137.6695             0.0009             0.0016             2.1059            23.2720
     17.073063241973     -0.000424667562                aP<<L*E          579766            19.1451          5482.5253             0.0003             0.0007             2.2468            19.4041
     16.435674484900      0.000064572300               aP<<LS*E         7083036            22.7559          5282.1718             0.0002             0.0012             1.8195            12.0130
     16.401720379186      0.000022153513               aPRRE/ER         7762908            22.8882          5271.4387             0.0002             0.0012             1.8709            11.7506
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_exp/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   1.3010878214432131        1.3010878832415685E-003
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.413312183838      0.375700065768                      P               1             0.0000          8132.2599             0.0685             0.1208             2.0719           320.0000
     25.413312183838      0.284986157071                     P>               3             1.5850          8133.8449             0.0685             0.1208             2.0719           256.3333
     24.970251913406      0.268262304007                    aP+              22             4.4594          7994.9400             0.0497             0.0904             1.9704           247.5909
     24.700062078493      0.556344761332                    aR>              46             5.5236          7909.5434             0.0488             0.1167             2.0221           211.9130
     24.446946836026      1.114583867566                    aRR             118             6.8826          7829.9056             0.0490             0.1286             2.0783           201.9576
     24.410704083441      1.313971585511                    aRS             136             7.0875          7818.5128             0.0757             0.2104             2.4191           200.7426
     24.133230166899      0.218624993177                   aP>+             200             7.6439          7730.2775             0.0279             0.0529             1.9343           198.7700
     22.600176088132      0.277163586043                   PaR+             217             7.7616          7239.8179             0.0148             0.0398             2.1745           195.9447
     22.412827141747      0.562921242052                   aP+R             408             8.6724          7180.7771             0.0102             0.0264             2.0060           138.7966
     22.179440864319      0.379795737840                   aR>>             640             9.3219          7106.7430             0.0132             0.0392             2.2549           107.5875
     21.463255110169      0.473309735905                   a>R>             704             9.4594          6877.7011             0.0055             0.0149             1.9648           103.2372
     20.053186036316      0.156763156003                  aPP++            2090            11.0293          6428.0488             0.0020             0.0048             1.9307            61.5053
     20.053186036316      0.313526312005                 PaERL+           30297            14.8869          6431.9064             0.0020             0.0048             1.9307            25.0020
     18.133093287224     -0.419877601247                 aaRE>-           33990            15.0528          5817.6427             0.0020             0.0065             3.7219            24.4365
     18.133093287218     -0.419877601247                 aaRE-<           41766            15.3500          5817.9399             0.0020             0.0065             3.7219            26.6109
     18.129866014488      0.419877587978                 aREa<-          122882            16.9069          5818.4640             0.0020             0.0065             3.7331            33.0037
     16.839393234439      0.999626502898                aP<<L*E          579766            19.1451          5407.7509             0.0003             0.0008             2.4676            34.2102
     16.422153148838      1.000052243940               aP<<LS*E         7083036            22.7559          5277.8449             0.0002             0.0012             1.8363            14.1558
     16.396345616039      1.000019488769               aPRRE/ER         7762908            22.8882          5269.7188             0.0002             0.0012             1.9012            13.7186
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_inverse/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     30.475670426495      2.852709583094                      P               1             0.0000          9752.2145             3.2380             8.9150             2.3448           320.0000
     30.134951330171      7.257158364107                     a~               8             3.0000          9646.1844             2.8490             8.1597             2.3707           320.0000
     29.701606499775      3.506613591975                    Pa/              35             5.1293          9509.6434             1.8957             5.2135             2.3168           320.0000
     29.248071576092     10.224883853212                    aE~              90             6.4919          9365.8748             1.9477             6.3457             2.3741           318.6000
     28.467886812433     10.003036527699                   aP~*             244             7.9307          9117.6545             2.0656             6.5009             2.9122           292.2500
     27.971927706689     -0.280160893303                   a\>E            1934            10.9174          8961.9342             0.9277             4.3041             2.3070           232.9524
     26.184140693593      2.073931347753                   aCEE            2084            11.0251          8389.9502             0.4219             1.8531             2.4057           223.9842
     26.184140693593     -1.067661393259                 PaCEE+           30757            14.9086          8393.8336             0.4219             1.8531             2.4057            66.1743
     24.750378199240      0.136024903030                 aPLL*\           44008            15.4255          7935.5465             0.0778             0.2107             2.5165            62.9576
     23.055956258872      0.046111110872                 P<E<a/          150253            17.1970          7395.1030             0.0296             0.0905             2.3946            41.0877
     22.696471360221     -0.024066256396                PaPLC*/          279439            18.0922          7280.9630             0.0147             0.0420             1.9101            28.7049
     22.099566022688      0.013919216894                aP<<L*\          521446            18.9922          7090.8533             0.0159             0.0539             2.2094            22.0138
     21.521357939674     -0.001713929900               aP<<LS*\         6558156            22.6449          6909.4794             0.0109             0.0305             2.4926            14.0707
     21.521357939674     -0.001713929900               a\P<<LS/        14722202            23.8115          6910.6460             0.0109             0.0305             2.4926            13.6480
     21.521357939670     -0.001713929900               P<<LS\a/        29847759            24.8311          6911.6657             0.0109             0.0305             2.4926            13.2785
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_inverse/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   14.909283991232455        1.4909284699385445E-002
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     30.475670426495      1.908045637441                      P               1             0.0000          9752.2145             3.2380             8.9150             2.3448           320.0000
     30.466061692142     -1.920238973679                     P~               7             2.8074          9751.9471             3.2249             8.8767             2.4038           320.0000
     21.584312062163      7.571167589585                     a\              10             3.3219          6910.3018             0.0111             0.0330             2.3654           320.0000
     21.584312062163     23.785525140430                   a\P/             602             9.2336          6916.2135             0.0111             0.0330             2.3654            27.4120
     21.584312062162      7.571167589585                   a\><             800             9.6439          6916.6237             0.0111             0.0330             2.3654            28.7537
     21.584174829033      7.571168307939                  aPS-\            4038            11.9794          6918.9154             0.0111             0.0330             2.3659            21.0210
     21.584087980839      7.571166979716                  a\PS-            7068            12.7871          6919.6952             0.0111             0.0330             2.3662            21.1462
     21.553899176603      0.326949464332                 aPE/S\           57080            15.8007          6913.0484             0.0124             0.0411             2.5856            18.8070
     21.538335538291      7.569489371283                aPS~R-\          523442            18.9977          6911.2650             0.0107             0.0290             2.4284            17.5131
     21.517594551552      7.574273977761                a\PS~R-         1113320            20.0864          6905.7167             0.0109             0.0298             2.4859            17.5029
     21.509390511732      0.766855076665               PPa/*E>L         4274891            22.0275          6905.0324             0.0118             0.0376             2.6847            16.5794
     21.509390511731      0.766855076665               PaP//E>L         4274953            22.0275          6905.0324             0.0118             0.0376             2.6847            16.5795
     21.461605442333     -0.001521947493               PP<EEa/-         5231951            22.3189          6890.0327             0.0108             0.0293             2.6541            16.9001
     21.451457626622      0.005206191788               PP>+Ea/<         9819967            23.2273          6887.6937             0.0108             0.0294             2.7262            16.2900
     21.418002752370      7.570399715070               a\aEEE\+        13966580            23.7355          6877.4964             0.0097             0.0441             2.4121            16.5884
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_log/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     27.811347791564     -4.938772298442                      P               1             0.0000          8899.6313             0.4029             0.9048             2.2113           320.0000
     25.556014176146     -3.103632331667                      a               2             1.0000          8178.9245             0.0870             0.2170             2.1767           320.0000
     18.880571144606     -2.024348707261                     aL              18             4.1699          6045.9527             0.0011             0.0035             2.0398           189.1111
     18.880571144606     -1.024348707261                    aL<              70             6.1293          6047.9120             0.0011             0.0035             2.0398            69.3429
     18.880425876646     -2.024348759368                  aPS-L            4614            12.1718          6053.9081             0.0011             0.0035             2.0404            18.1450
     18.880425876646     -1.024348759368                 aPS-L<           54728            15.7400          6057.4763             0.0011             0.0035             2.0404            16.1715
     18.842283202190      1.117948876769                 aPE/SL           62264            15.9261          6045.4567             0.0012             0.0040             2.2885            15.9996
     18.830567048944     -2.024126699101                aPS~R-L          570098            19.1209          6044.9023             0.0011             0.0034             2.1318            16.0210
     18.738840987900     -2.024606572595                aLPE\C/         1145836            20.1280          6016.5571             0.0012             0.0031             2.4628            15.9968
     18.738840987897     -2.024606572595               aLPE\C\*        14195314            23.7589          6020.1880             0.0012             0.0031             2.4628            15.3387
     18.737413208052     -2.024606583658               aLPE\SC/        14743522            23.8136          6019.7858             0.0012             0.0031             2.4672            15.4123
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_log/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   2.7019841055734144        2.7019842339107729E-003
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     27.811347791564     -0.572060004458                      P               1             0.0000          8899.6313             0.4029             0.9048             2.2113           320.0000
     27.591602633972     -2.261534474113                     a\              10             3.3219          8832.6348             0.5775             1.7534             2.3370           301.1000
     25.489902635334      0.978832621394                    aP-              30             4.9069          8161.6757             0.0823             0.2035             2.1341           281.9333
     25.375029250199     -0.976558175431                    a\>              44             5.4594          8125.4688             0.0710             0.1985             2.0118           233.2273
     21.258615769804     -4.048185487474                    a>\              92             6.5236          6809.2806             0.0071             0.0210             2.2309           165.9674
     21.258615769803     -1.288577425911                   Pa>/             309             8.2715          6811.0285             0.0071             0.0210             2.2309            68.0615
     20.148994463434     -5.503596068441                   aRE\            1270            10.3106          6457.9888             0.0030             0.0099             2.6436            37.3622
     20.148994463434     -5.503596068441                   aR~E            1972            10.9454          6458.6237             0.0030             0.0099             2.6436            32.0248
     20.080491966676      2.024668258322                  aRLS<           12524            13.6124          6439.3698             0.0029             0.0089             2.7955            25.6531
     20.080491966663      0.644471904932                PaRLS<*          407303            18.6357          6444.3932             0.0029             0.0089             2.7955            22.9536
     19.231692591515      1.001430837056                aP<<L*L          568102            19.1158          6173.2574             0.0012             0.0032             1.8569            22.2725
     19.137045316741      1.009742619811                aPLL*SL          685306            19.3864          6143.2409             0.0017             0.0054             2.5579            20.4793
     18.902206896526      0.999813396515               aP<<LS*L         6978060            22.7344          6071.4406             0.0012             0.0036             1.9843            15.0289
     18.745252586967      1.000963476456               aPCES*L<         7429664            22.8249          6021.3057             0.0012             0.0031             2.4718            14.7839
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sin/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.155637133184     -2.976585096237                      P               1             0.0000          8049.8039             0.0574             0.0980             2.0627           320.0000
     25.155637133184     -9.704597305607                    PP*              25             4.6439          8054.4477             0.0574             0.0980             2.0627           221.8800
     24.527426545004     -0.894027207117                    aRR             118             6.8826          7855.6591             0.0464             0.1170             2.0483           218.7542
     23.914026603302     -0.731039064325                    aRS             136             7.0875          7659.5760             0.0510             0.1444             2.2935           214.3750
     22.879055461458      0.005005029061                   aP-E             480             8.9069          7330.2046             0.0189             0.0596             2.0737           176.9083
     21.649834618468     -0.190033287144                   aRP/             604             9.2384          6937.1855             0.0104             0.0303             2.2860           154.8063
     21.097413943230     -1.058084173569                   a>RR            1352            10.4009          6761.5733             0.0058             0.0170             2.0844            95.2559
     20.555230031524     -0.004646287315                  aPLL*            2822            11.4625          6589.1361             0.0022             0.0037             1.6932            64.6743
     20.136469704616     -1.017818561485                  aP/>R            5526            12.4320          6456.1023             0.0027             0.0071             1.9675            44.1477
     19.866948181367      0.006373493711                 aaPL/-           24094            14.5564          6371.9798             0.0017             0.0035             2.1472            27.7675
     19.662805058467     -1.854148749247                 aPP++L           26444            14.6907          6306.7883             0.0020             0.0056             2.0955            27.4252
     19.662805058467     -1.854148749247                 PaP++L           26445            14.6907          6306.7883             0.0020             0.0056             2.0955            27.4362
     19.424467858954     -0.001180634796                 aP<<L*           33076            15.0135          6230.8432             0.0010             0.0019             1.5747            25.9513
     17.171082266624      0.000765395909                 aP>RE/           39336            15.2636          5510.0099             0.0003             0.0006             2.2313            23.8215
     16.431929573735      0.001508511047                aPPE>/*          275126            18.0697          5276.2872             0.0003             0.0007             2.3169            13.9941
     16.431929573735      0.001508511047                PaPE>/*          275127            18.0697          5276.2872             0.0003             0.0007             2.3169            13.9952
     16.431929573735      0.001508511047                aPE>P//          375638            18.5190          5276.7364             0.0003             0.0007             2.3169            13.3964
     16.431929573733      0.001508511047                aP*PE>/          846690            19.6915          5277.9089             0.0003             0.0007             2.3169            12.1585
     16.415000130064      0.001482691224               aPPEC~//         3358536            21.6794          5274.4794             0.0003             0.0007             2.3771            11.4113
     16.415000130064      0.001482691224               aPECP~/*         4924432            22.2315          5275.0316             0.0003             0.0007             2.3771            11.4522
     16.168064274051      0.000052041149               aP<<LS*S         6768108            22.6903          5196.4709             0.0002             0.0009             1.8205            11.1110
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sin/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.26017235446000880        2.6017236681753254E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.155637133184      0.052523563166                      P               1             0.0000          8049.8039             0.0574             0.0980             2.0627           320.0000
     18.500955517042      0.131489535929                      a               2             1.0000          5921.3058             0.0006             0.0013             1.6347           320.0000
     18.456696820695     -0.131511171947                     a~               8             3.0000          5909.1430             0.0007             0.0014             1.7575           130.6250
     18.456678677033     -0.131511162784                   PSa-             587             9.1972          5915.3344             0.0007             0.0014             1.7575            46.5111
     18.335062859416      3.044270054189                  aPE/S            4374            12.0947          5879.3149             0.0006             0.0012             1.6502            38.6754
     17.040900681012      0.100398015538                 aaP/S+           24582            14.5853          5467.6735             0.0003             0.0015             1.8351            25.1089
     16.571916811123      0.913754423073                 aPL<*S           46384            15.5013          5318.5147             0.0002             0.0012             1.7712            29.7332
     16.122975819380      0.977448243028                 aPLL*S           46600            15.5080          5174.8603             0.0002             0.0010             1.9201            29.6835
     16.104920889715      0.976260659901                 aL<<ES          228872            17.8042          5171.3789             0.0002             0.0010             1.9855            17.0275
     16.091082027831      1.044165923883                aaPL/-S          297872            18.1843          5167.3306             0.0002             0.0008             2.1902            16.8981
     16.084464446699      1.047010922167                aP>ER/S          549882            19.0688          5166.0974             0.0002             0.0008             2.2195            19.1887
     16.077940531694      1.020464007886               aPP<*>/S         3711424            21.8235          5166.7645             0.0002             0.0008             2.0554            15.7160
     16.063233549785     -1.050726441372               aPP*>C*S         4033912            21.9437          5162.1785             0.0002             0.0007             2.3177            15.9180
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sqrt/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.494417094591     -2.734449323616                      P               1             0.0000          8158.2135             0.0751             0.1482             2.0932           320.0000
     25.406496461865      0.006462716325                    aP/              34             5.0875          8135.1663             0.0661             0.1255             1.9701           220.7059
     23.825431553460     -0.651637294264                    aRR             118             6.8826          7631.0207             0.0270             0.0665             1.9994           222.8136
     23.300005005403     -0.483833589146                    aRS             136             7.0875          7463.0891             0.0301             0.0891             2.2866           213.7132
     23.096978096058     -0.149638325204                   aa>/             310             8.2761          7399.3091             0.0261             0.0719             2.1802           142.0419
     22.463801993613      0.050593102797                   aRP/             604             9.2384          7197.6550             0.0094             0.0184             2.0217           111.9801
     20.908492730078     -1.048925221147                   aR>R            1288            10.3309          6701.0486             0.0037             0.0098             1.9883            80.3175
     18.151801091913      0.121971404382                  aaP+/            2188            11.0954          5819.6717             0.0011             0.0038             2.7621            57.8144
     18.151801091912      0.121971404382                  Pa/>\            5383            12.3942          5820.9705             0.0011             0.0038             2.7621            36.6147
     18.151801091911      0.121971404382                 aaP+\*           24782            14.5970          5823.1734             0.0011             0.0038             2.7621            25.2514
     18.151801091911      0.121971404382                 aP/\>\           71400            16.1236          5824.7000             0.0011             0.0038             2.7621            22.5649
     17.014333793185      0.877798046073                 aRRCS~          185990            17.5049          5462.0917             0.0007             0.0022             2.4296            21.9114
     16.787646812493     -0.000523524365                aP<<L*R          533110            19.0241          5391.0711             0.0002             0.0008             1.8780            16.0381
     16.767539221580      0.000861435347               aPPLC//R         3507568            21.7420          5387.3546             0.0003             0.0011             2.0810            11.0234
     16.767539221580      0.000861435347               aPLCP/*R         5114940            22.2863          5387.8988             0.0003             0.0011             2.0810            10.9652
     16.514005639889      0.000061544441               aP<<LS*R         6663132            22.6678          5307.1496             0.0002             0.0009             1.9342            10.6180
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sqrt/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.51303089603166252        5.1303092039932255E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.494417094591      0.129597771245                      P               1             0.0000          8158.2135             0.0751             0.1482             2.0932           320.0000
     25.454204437855      0.323427417346                      a               2             1.0000          8146.3454             0.0684             0.1292             1.9726           320.0000
     22.083099997608      0.178415254506                     a>               4             2.0000          7068.5920             0.0078             0.0197             1.9876           320.0000
     16.530346371604      0.363427899067                     aR              12             3.5850          5293.2958             0.0002             0.0009             1.9031           165.9167
     16.530346371604      0.205042232171                   aP*R             412             8.6865          5298.3973             0.0002             0.0009             1.9031            21.9903
     16.530346371604      0.363427899067                   a><R            1298            10.3421          5300.0529             0.0002             0.0009             1.9031            18.8105
     16.530201114487      0.363427889598                  aPS-R            4182            12.0300          5301.6943             0.0002             0.0009             1.9037            16.6181
     16.530184212669      0.363427874538                  aRPS-            7070            12.7875          5302.4464             0.0002             0.0009             1.9038            16.6274
     16.491940381734      1.748877998122                 aPE/SR           58376            15.8331          5293.2540             0.0002             0.0010             2.1474            14.5708
     16.480507101976      0.363468243286                aPS~R-R          535106            19.0295          5292.7917             0.0002             0.0009             2.0040            14.4283
     16.456331270355      0.000107418500               aaPS~/R+         3375074            21.6865          5287.7125             0.0002             0.0009             2.0864            12.6542
     16.421283347554     -0.000107543565               PaPS~/R-         3421729            21.7063          5276.5170             0.0002             0.0008             2.1974            12.6763
     16.412135469051      0.000107543403               aPS~/RP-         8422504            23.0058          5274.8892             0.0002             0.0008             2.2175            13.3120
     16.385501795822      0.000107511063               aPS~/R<<         8585800            23.0335          5266.3941             0.0002             0.0009             2.2153            13.3170
     16.383635353693     -0.420048866172               PaR/LLS<        10159501            23.2763          5266.0396             0.0002             0.0009             2.0637            13.2835
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     23.556773918980     -3.114114453052                      P               1             0.0000          7538.1677             0.0194             0.0418             2.0001           320.0000
     23.517711071261     -1.519869926577                   aaC+             226             7.8202          7533.4877             0.0452             0.1429             2.4297           168.4292
     20.818891539882     -0.024274019231                   aPE/             340             8.4094          6670.4547             0.0031             0.0077             1.8435           158.2235
     20.818891539882     -0.024274019231                  aPE\*            2682            11.3891          6673.4344             0.0031             0.0077             1.8435            50.8542
     20.785498728627     -0.026827214072                  aPE</            3258            11.6698          6663.0294             0.0033             0.0084             1.9041            47.3088
     20.741543088543     -1.025919695757                  aPE/E            4806            12.2306          6649.5244             0.0031             0.0082             1.8465            42.9230
     20.703264131922     -0.519438242611                  aRLCC           19976            14.2860          6639.3305             0.0189             0.0634             3.4475            37.6823
     20.036149148186     -0.170277718889                 PPa-+\           25951            14.6635          6426.2312             0.0023             0.0069             2.0861            51.7420
     19.479473254607     -0.910826776434                 aP/C>S           74040            16.1760          6249.6075             0.0022             0.0078             2.0957            37.9207
     19.123045148562     -0.318049993223                PaP/C*\          316983            18.2740          6137.6485             0.0024             0.0072             2.3872            31.7360
     18.569140506088     -1.787878840860                PaP-E+R          317903            18.2782          5960.4032             0.0007             0.0020             1.8494            31.7479
     17.686617276317     -1.143979127009                aaP/S/L          322136            18.2973          5678.0148             0.0004             0.0010             2.2588            31.5492
     16.880632049702     -0.540826539073                aPER/CC          675482            19.3656          5421.1678             0.0003             0.0011             1.9817            23.7326
     15.270167681538     -0.156121793373                aP/C>RC          977162            19.8982          4906.3519             0.0001             0.0007             2.1848            19.8761
     15.270167681538     -0.156121793373               aP\*C>RC        10663424            23.3462          4909.7998             0.0001             0.0007             2.1848            10.4674
     15.270167681537      0.843878206627               aP/C>RC<        12136316            23.5328          4909.9865             0.0001             0.0007             2.1848            10.3874
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   6.9274608629488199E-002   6.9274611919855554E-005
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     23.556773918980      0.008746610470                      P               1             0.0000          7538.1677             0.0194             0.0418             2.0001           320.0000
     22.466679533978      0.021900208670                      a               2             1.0000          7190.3375             0.0103             0.0258             1.9807           320.0000
     22.071759222412      0.095597561906                     aL              18             4.1699          7067.1329             0.0263             0.0693             3.2470           305.8889
     22.065327239894      0.007835712221                     aE              20             4.3219          7065.2266             0.0065             0.0122             1.9158           307.3000
     14.464047223487      0.017445083559                    aa*              28             4.8074          4633.3025             0.0001             0.0005             1.8850           301.9286
     14.464047223487      0.017445083559                   aa\/             322             8.3309          4636.8260             0.0001             0.0005             1.8850            38.6211
     14.464047223487      0.005552942407                  aaP**            2132            11.0580          4639.5531             0.0001             0.0005             1.8850            14.8058
     14.464047223487      0.005552942407                  Paa**            2135            11.0600          4639.5551             0.0001             0.0005             1.8850            15.0927
     14.464047223487      0.054805347874                  aPa//            2214            11.1124          4639.6076             0.0001             0.0005             1.8850            15.2358
     14.464047223487      0.004212167794                 aaP>**           23606            14.5269          4643.0220             0.0001             0.0005             1.8850            10.6195
     14.463975159139      0.017445082650                 aaPS-*           23718            14.5337          4643.0057             0.0001             0.0005             1.8854            10.7918
     14.438022197238    -18.690562420871                 aPE/C<           54632            15.7375          4635.9046             0.0001             0.0005             1.9198            11.7337
     14.396073419968    -18.671461924917                 aPE/CL           62408            15.9294          4622.6729             0.0001             0.0004             2.1112            11.7431
     14.396073419967    -18.671461924917                aPE\*CL          686462            19.3888          4626.1323             0.0001             0.0004             2.1112            13.6840
     14.393104652825     18.671451253669                aPE/CL~          766058            19.5471          4625.3406             0.0001             0.0004             2.1239            13.8026
     14.386672438506    -18.671471714261                aPE/CLS          801050            19.6115          4623.3467             0.0001             0.0004             2.1578            13.7244
     14.385612068718     -9.205154755523               aPS~L/CL         8054116            22.9413          4626.3372             0.0001             0.0004             2.4740            13.3642
     14.363832966072     -5.051408857545               aP<E/CR<         8623584            23.0399          4619.4664             0.0001             0.0004             2.4058            13.4732
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_tan/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     25.217022889947     -2.974291782868                      P               1             0.0000          8069.4473             0.0599             0.1022             2.0656           320.0000
     25.217022889947     -1.974291782868                     P<               5             2.3219          8071.7693             0.0599             0.1022             2.0656           243.6000
     25.217022889947     -9.702303992238                    PP*              25             4.6439          8074.0912             0.0599             0.1022             2.0656           224.4400
     24.402287214135     -0.891689436578                    aRR             118             6.8826          7815.6146             0.0446             0.1148             2.0565           220.9153
     23.881176750711     -0.724537755934                    aRS             136             7.0875          7649.0640             0.0480             0.1380             2.3625           215.7794
     22.791615731678      0.007348499760                   aP-E             480             8.9069          7302.2239             0.0166             0.0527             2.0236           178.5688
     21.696513720419     -0.185503366550                   aRP/             604             9.2384          6952.1228             0.0085             0.0259             1.9984           156.0728
     21.406801821286     -1.054307651635                   a>RR            1352            10.4009          6860.5775             0.0049             0.0134             1.9295            94.2714
     21.338816837241     -0.014382920472                  aPL<*            2606            11.3476          6839.7690             0.0039             0.0081             1.7653            67.0902
     18.069407567980     -0.001845129157                  aPLL*            2822            11.4625          5793.6729             0.0007             0.0029             2.1749            64.3154
     18.029717670195     -0.001555293172                 aPLLS*           32668            14.9956          5784.5052             0.0009             0.0034             2.1205            18.6204
     17.996200975593     -0.001180715570                aPLLSS*          418978            18.6765          5777.4608             0.0011             0.0038             2.2611            13.8713
     17.645315485994     -0.349316495084                aP/S<ES          970810            19.8888          5666.3898             0.0008             0.0023             2.3630            13.8668
     17.278846864007      0.754016132049                aRC>R>C         2874838            21.4550          5550.6860             0.0006             0.0018             2.2928            13.4290
     16.915920306315     -2.031027855319               aPaRC++R         3497828            21.7380          5434.8325             0.0003             0.0009             2.0668            13.1112
     16.915920306315     -2.031027855319               PaaRC++R         3497829            21.7380          5434.8325             0.0003             0.0009             2.0668            13.1113
     16.532384197625     -0.407500887305               Pa<-P/RC         9680509            23.2067          5313.5696             0.0003             0.0009             2.1460            11.3612
     16.259969908220     -2.842435291110               a>PE</>E        16693664            23.9928          5227.1832             0.0002             0.0012             2.2580            11.0672
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_tan/kinetic.txt_train-mult_a
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.26945167976297640        2.6945169256124444E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     25.217022889947      0.053253547464                      P               1             0.0000          8069.4473             0.0599             0.1022             2.0656           320.0000
     18.879956687299      0.133338943801                      a               2             1.0000          6042.5861             0.0014             0.0047             2.5902           320.0000
     18.879956687299      0.133338943801                    aEL             180             7.4919          6049.0780             0.0014             0.0047             2.5902            50.6778
     18.879945356361      0.133338953091                   aPS+             220             7.7814          6049.3639             0.0014             0.0047             2.5902            50.5091
     18.879921089532      0.133338972988                 aPPS*+           23356            14.5115          6056.0863             0.0014             0.0047             2.5902            37.5176
     17.675064567037      0.193145884483                 aaP/S-           25158            14.6187          5670.6394             0.0003             0.0007             1.8920            40.1538
     17.671080561570     -0.193158758395                 aP/Sa-           67112            16.0343          5670.7801             0.0004             0.0008             1.9223            33.2377
     17.527870552937      0.133265762291                 a<aR/E          103436            16.6584          5625.5770             0.0004             0.0012             2.0907            28.4872
     17.238082067758     -2.577269277976                 aRP/CL          114800            16.8088          5532.9950             0.0003             0.0010             2.1338            27.6445
     16.433195468224      0.002079443135                aaP>E+*          273696            18.0622          5276.6848             0.0003             0.0015             2.2435            21.1600
     16.059215034772      0.137835461279                aaSPE/-          342508            18.3858          5157.3346             0.0002             0.0012             2.4606            21.5533
     16.059215034772      0.005956409837                aPE*aS-          708386            19.4342          5158.3830             0.0002             0.0012             2.4606            20.6711
     16.057074124555      0.137834252783               aaSPE/S-         4459230            22.0884          5160.3521             0.0002             0.0012             2.4677            17.1792
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
0.0 24.57 sqrt(-9.205154755523*log(cos((x0/log((-sin(pi)))))))
45.59 16.19 0.132079830938*(x0-sin(pi))
45.59 16.17 0.132079837820*x0
51.8 16.11 -0.000065453019+(x0/(((pi*sqrt(pi))+1)+1))
60.01 16.09 -0.000121747890+(x0/(pi*exp(sqrt((sqrt(pi)-1)))))
75.61 16.04 -0.000026540308*(pi-(x0*exp(exp((pi-1)))))
82.53 16.03 0.000083574428*((x0*exp((exp(pi)/pi)))-1)
104.78 16.01 0.132144102682*(x0-(pi/exp(exp((pi-1)))))
104.78 16.0 0.132144231096*(x0-exp((exp(pi)/(-pi))))

Just one variable!
Checking for symmetries...
kinetic.txt_train-mult_a just one variable for ADD 

kinetic.txt_train-mult_a just one variable for ADD 

kinetic.txt_train-mult_a just one variable for ADD 

kinetic.txt_train-mult_a just one variable for ADD 


Checking for separabilities...
kinetic.txt_train-mult_a just one variable for ADD
kinetic.txt_train-mult_a just one variable for ADD

Checking for compositionality...

Checking for generalized symmetry...

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/separable_mult/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     29.765744166847     -2.141592741013                      P               1             0.0000          9525.0381             2.6166             8.8840             2.3897           320.0000
     29.422952775985      0.531268660000                      a               2             1.0000          9416.3449             2.4149             8.4530             2.4376           320.0000
     28.865622146703      2.020289126527                     aL              18             4.1699          9241.1690             2.1719             7.9693             2.6354           316.5000
     28.178102995738     -0.333996159973                    aP*              26             4.7004          9021.6934             1.9534             7.3913             2.8731           317.5769
     27.922907831804     -3.108324313817                    a>E             182             7.5078          8942.8383             1.5549             6.3080             2.8037           287.1483
     27.646445412494     -1.330927270487                   aa+E             474             8.8887          8855.7513             1.1814             5.1682             2.6109           269.9452
     27.442617142010     -0.319739122091                   aL\~            1024            10.0000          8791.6375             0.4497             0.9774             2.2369           250.5488
     26.552318301121     -1.251452293534                  aa<\-            2980            11.5411          8508.2830             0.2407             0.5520             2.3495           184.4581
     24.832617496642     -1.101644561431                  aaE*E            4736            12.2095          7958.6471             0.3176             1.8469             2.7150           157.3296
     22.362526804147     -4.810753270210                 PaC/ER           58801            15.8436          7171.8521             0.4015             2.1887             4.6342            65.2954
     22.362526804143     -7.952346011223               PPaC/ER+         3571355            21.7680          7177.7766             0.4015             2.1887             4.6342            51.9006
     22.362526804142     -4.810753270210               PaCEL/ER         7762737            22.8881          7178.8967             0.4015             2.1887             4.6342            52.2665
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/separable_mult/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   9.8840007781982422        9.8840012476630879E-003
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     29.765744166847      0.318309877326                      P               1             0.0000          9525.0381             2.6166             8.8840             2.3897           320.0000
     28.792086456123      2.133418260447                      a               2             1.0000          9214.4677             2.1982             7.9644             2.5901           320.0000
     28.790206386264     -2.188684209804                     a~               8             3.0000          9215.8660             2.1761             7.9147             2.5954           320.0000
     26.758930590935      4.551473474011                    aa*              28             4.8074          8567.6651             1.5430             6.1993             3.3583           315.5000
     26.484394663352     -8.814325197197                    aCL             176             7.4594          8482.4657             1.3834             5.6960             3.3964           234.6193
     26.019916222485     -1.487184668148                   aaL/             338             8.4009          8334.7741             0.5129             2.7842             2.5808           213.2663
     25.895862195912      8.271460610219                   aC\<             860             9.7482          8296.4241             1.1301             4.8530             3.5196           151.2837
     25.072916237737      3.604513504801                  aaE<*            2612            11.3509          8034.6841             1.1959             5.1521             4.3015           134.4552
     24.552931005578      0.483305784300                 aaP*E*           24950            14.6068          7871.5447             0.4489             2.5395             3.0052           122.2156
     24.492273534247     -6.277844856266                 aa~>L+           30130            14.8789          7852.4064             0.1690             1.0923             2.7955           113.3104
     24.435772148861     -3.490111211605                 aa~>L*           33046            15.0122          7834.4593             0.5426             2.6608             3.8495           108.8536
     23.145771306469     -7.508389064056                 aaC/C<           54626            15.7373          7422.3841             0.6551             3.3025             4.8261           105.9656
     22.278795186675     -3.736255965319                aaaS\-/          279860            18.0943          7147.3088             0.1391             0.9690             3.4277            76.4455
     22.223155339309     -7.488673134239                aSaC/CL         1359294            20.3744          7131.7841             0.1628             1.0224             3.4156            43.4020
     21.278415248242     -3.152078469896               PaRC*C\>         8506237            23.0201          6832.1130             0.1098             0.7889             3.0625            33.8936
     19.481149107383      7.566913381123               aa~*>R\<        10131198            23.2723          6257.2400             0.0096             0.1109             2.8355            32.6149
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
46.86 29.78 0.318309877326*pi
47.59 29.42 0.531268660000+x0
49.6 28.79 2.133418260447*x0
49.64 28.79 -2.188684209804*(-x0)
51.68 28.19 -0.333996159973+(x0*pi)
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
61.92 24.44 -3.490111211605*(x0*log(((-x0)+1)))
66.92 22.28 -3.736255965319*(x0/(x0-(sin(x0))**(-1)))
70.06 22.22 -7.488673134239*log(cos((sin(x0)/cos(x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     30.992152946741     -2.141592741013                      P               1             0.0000          9917.4889            20.8367            96.6935             3.0228           320.0000
     30.765214689338      0.531268660000                      a               2             1.0000          9845.8687            20.6720            96.2624             3.1126           320.0000
     30.511244063517      2.185140510418                     aL              18             4.1699          9767.7680            20.3923            95.6140             3.2641           320.0000
     30.422057928595      0.062537320000                    aa+              24             4.5850          9739.6435            20.5090            95.8314             3.2827           320.0000
     30.072878307728     -0.256674899114                    aP*              26             4.7004          9628.0215            20.2315            95.1235             3.5978           320.0000
     29.932598919599     -3.040289718441                    a>E             182             7.5078          9585.9394            19.8542            94.0495             3.5849           298.6209
     29.853534080643     -3.218108612304                    aEE             198             7.6294          9560.7603            18.2728            89.2183             3.5417           297.4495
     29.787697721814     -1.250536692692                   aa+E             474             8.8887          9540.9520            19.4817            92.8973             3.6539           304.2869
     28.403291513430      1.004972058688                   aEEC            1764            10.7846          9099.8379            20.9393            96.0461             5.1067           289.1729
     28.403291513430      0.004972058688                  aEEC>           11254            13.4581          9102.5114            20.9393            96.0461             5.1067           285.7869
     27.973876700955      1.005556630033                  aR<\S           17924            14.1296          8965.7701            20.8124            97.2437             5.4801           271.2573
     27.740898603397      0.849382755567                  aEECS           18544            14.1787          8891.2662            20.9921            96.2449             5.6344           271.1540
     27.740898603397     -2.292209985446                PaEECS+          393099            18.5845          8895.6721            20.9921            96.2449             5.6344           251.9250
     27.424501663419     -1.147183216738                Pa>ECE*          428059            18.7075          8794.5480            18.2941            90.9525             5.2805           250.5730
     26.765442050671    -15.155442993896                aa*C\EE         1006100            19.9403          8584.8818             8.1420            41.9173             4.8639           223.6102
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   97.693471383423457        9.7693476023614362E-002
          87  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     31.055036080815      0.356946102026                      P               1             0.0000          7235.8234            21.0303            96.5721             3.2261           233.0000
     30.432389039759      2.336180655014                      a               2             1.0000          7091.7466            20.6524            95.5915             3.4900           233.0000
     29.743621994632      4.866988480450                    aa*              28             4.8074          6935.0713            20.0053            93.7533             3.8781           226.8214
     29.429091568992      0.023515144190                    a>C             146             7.1898          6864.1682            21.5433            97.7011             4.9480           212.3836
     29.425600018198     -0.000647690691                   aa<+             206             7.6865          6863.8513            21.5408            97.6940             5.0060           209.5534
     28.922547525119     61.541774347972                   aaS-             294             8.1997          6747.1532            18.9366            90.5188             4.3816           214.4048
     28.915988354101     11.756767435847                   a\E\            1268            10.3083          6747.7336            19.9478            93.8244             4.9194           211.5536
     28.907664339925     10.139445687984                  aaa**            2136            11.0607          6746.5465            18.8734            90.3077             4.3855           200.2411
     28.852062199968    -19.481350994352                  aaCL*            2820            11.4615          6733.9920            18.5990            89.3650             4.3976           202.7780
     28.363006275571     28.330128598388                  aa\E/            3492            11.7698          6620.3503            18.3721            89.3047             5.1963           203.3044
     27.553818511172    -42.434610524440                  aa*C<            5184            12.3399          6432.3796            17.0665            84.5307             5.2579           205.6339
     27.478148179497    -41.871418228121                  aa*CL            6048            12.5622          6414.9708            16.4532            82.1450             5.2555           202.7250
     27.266244970648   -156.145089297315                  aCLC<           12690            13.6314          6366.6665            15.9398            80.3971             5.3387           203.6121
     27.239498688235   -155.583726122185                  aCLCL           21438            14.3879          6361.1911            15.7015            79.4278             5.3362           190.6996
     26.297406760656      0.009225376162                 aPP**E           26612            14.6998          6141.9956             4.3307            31.3743             3.4721           192.8807
     26.297406760652      0.009225376162                 PaP**E           26613            14.6998          6141.9956             4.3307            31.3743             3.4721           192.8822
     26.107200266739      0.000049626935                 aRREEE          269420            18.0395          6101.0172             4.0290            29.6735             3.4696           106.6130
     26.093816102562    -26.211037730706                aaE<*C<          616408            19.2335          6099.0927            15.1754            78.1710             6.2612           102.2892
     25.713841478483    -25.818696701757                aaE<*CL          686392            19.3887          6010.7137            11.8171            62.4307             6.2396           109.3511
     25.138949659828      0.000000004863                PEaRR*E         1251011            20.2547          5877.6299            12.4763            67.8514             5.9917           137.8876
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
46.86 29.78 0.318309877326*pi
47.59 29.42 0.531268660000+x0
49.6 28.79 2.133418260447*x0
49.64 28.79 -2.188684209804*(-x0)
51.68 28.19 -0.333996159973+(x0*pi)
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
61.92 24.44 -3.490111211605*(x0*log(((-x0)+1)))
66.92 22.28 -3.736255965319*(x0/(x0-(sin(x0))**(-1)))
70.06 22.22 -7.488673134239*log(cos((sin(x0)/cos(x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_atan/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     28.407103380687     -2.356194577615                      P               1             0.0000          9090.2731             0.4991             0.7735             2.0121           320.0000
     27.507180927981      0.316666823397                      a               2             1.0000          8803.2979             0.2543             0.3823             1.9108           320.0000
     25.087437175717      1.593986176954                     aL              18             4.1699          8032.1498             0.2733             1.2372             2.8746           302.3333
     25.087437175717      0.593986176954                    aL>              52             5.7004          8033.6803             0.2733             1.2372             2.8746           216.6346
     25.087437175717      2.593986176954                    aL<              70             6.1293          8034.1092             0.2733             1.2372             2.8746           203.2143
     25.069668668688     -0.254095269991                   aP<*             240             7.9069          8030.2009             0.0692             0.2029             2.0383           160.2583
     24.405706752294      1.020216678119                   aL<C            1636            10.6760          7820.5021             0.0500             0.2292             2.1527            86.8166
     24.233431307717     -3.094381195654                  aaC+E            4692            12.1960          7766.8940             0.0566             0.2261             2.3887            76.7449
     24.233431307717     -4.094381195654                 aaC+E>           53510            15.7075          7770.4055             0.0566             0.2261             2.3887            66.8673
     23.194218706318     -1.306736340387                 aPR*SE           63472            15.9538          7438.1038             0.0558             0.2074             2.9330            65.8179
     22.783843006210      0.019251847312                Pa\<E>/          457627            18.8038          7309.6336             0.0358             0.0803             3.8505            58.7710
     22.539691932448     -0.963953588637                aRLCES\         2592976            21.3062          7234.0076             0.0169             0.1083             2.0295            61.6536
     22.089443997721      0.504481251170               PaCC~/<S         7784373            22.8921          7091.5142             0.0287             0.0591             3.7594            37.9831
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_atan/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   1.4699658237371822        1.4699658935568123E-003
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     28.407103380687      0.249999993043                      P               1             0.0000          9090.2731             0.4991             0.7735             2.0121           320.0000
     26.088575407820      1.639675861609                      a               2             1.0000          8349.3441             0.1051             0.1736             1.9816           320.0000
     26.065983758265     -1.642100609694                     a~               8             3.0000          8344.1148             0.1048             0.1741             2.0144           192.6250
     25.891662301229      3.533004016469                    aa*              28             4.8074          8290.1393             0.4991             1.3902             3.2632           185.8571
     25.714934600545     -7.203255792717                    aC<              68             6.0875          8234.8665             0.4543             1.2543             3.3134           208.8235
     25.564095498478      3.648682894276                   aaS*             258             8.0112          8188.5218             0.4017             1.1012             3.2839           228.7326
     24.530986682970     -7.666904293437                   aSC<             912             9.8329          7859.7486             0.2845             0.7636             4.1507           227.1086
     24.102205867299     -0.811445425654                  aP*C<            5182            12.3393          7725.0452             0.0536             0.1145             2.7754           174.8545
     24.017734222920      0.097042762058                  aLCEE           23204            14.5021          7700.1770             0.0600             0.1310             2.9308            88.1220
     23.415630426823      1.241018141119                 aaP**S           26230            14.6789          7507.6807             0.1973             0.7710             3.5013            90.1416
     23.271937204737      1.808195082785                 aa\CC*           32942            15.0076          7462.0275             0.0777             0.2094             4.2319            91.5758
     23.118477383506      9.160287319040                 Pa\E+\           43705            15.4155          7413.3283             0.0412             0.0945             2.8921           100.6067
     22.568095704350     -9.429939485089                 a<C\S<          172412            17.3955          7239.1861             0.0328             0.0739             3.5424            68.6013
     22.456161564431      0.167331115649                P<aLC*E         1251753            20.2555          7206.2272             0.0180             0.0624             2.4074            60.6096
     22.368685554273     -9.610923978401                a<C\CCL         3075064            21.5522          7179.5316             0.0314             0.0732             2.9502            40.4926
     21.530041273263     -2.407189852882                aLC<ECL         3077668            21.5534          6911.1666             0.0087             0.0192             2.6457            40.4789
     21.467863117314      0.684271840110               PaSSE*C>         7313885            22.8022          6892.5184             0.0249             0.1035             2.9360            34.2852
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
46.51 28.45 tan(-2.356194577615+pi)
51.68 28.19 -0.333996159973+(x0*pi)
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
61.92 24.44 -3.490111211605*(x0*log(((-x0)+1)))
66.92 22.28 -3.736255965319*(x0/(x0-(sin(x0))**(-1)))
70.06 22.22 -7.488673134239*log(cos((sin(x0)/cos(x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_cos/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     28.262647188237     -2.455651998333                      P               1             0.0000          9044.0471             0.7172             1.6851             2.2394           320.0000
     27.373000349831      1.105580081245                     a~               8             3.0000          8762.3601             0.5673             1.4008             2.5401           320.0000
     27.140456231466      2.167029516654                    aE~              90             6.4919          8691.4378             0.5049             1.1484             2.6460           306.6444
     27.121364944608      0.599586697013                    aEC             162             7.3398          8686.1766             0.5023             1.1656             2.6589           296.8642
     26.819210044764     -2.127219041689                   PaC*             261             8.0279          8590.1751             0.5372             1.2708             2.9683           282.4100
     26.806880550119      0.029336003895                   aa+C             442             8.7879          8586.9897             0.5132             1.1944             2.9327           279.2805
     26.782147364152     -0.015260918174                   aLS~            1060            10.0498          8580.3370             0.5557             1.3279             3.2931           276.3783
     26.716937816787      2.023555615175                   aLS\            1222            10.2550          8559.6751             1.8941             6.5649             3.7115           276.0147
     26.393727816307      0.182640941270                   aL\C            1672            10.7074          8456.7003             0.2094             0.7903             2.2285           271.2703
     25.839751318304      0.004087175333                  aa</C            4492            12.1331          8280.8536             0.3743             1.0275             3.2347           219.3148
     25.409809299065     -0.016728655463                  aa+ES            5788            12.4988          8143.6378             0.5562             1.8382             3.3138           215.9955
     25.166967601963     -0.035618897501                 aaS+ES           59986            15.8723          8069.3020             0.6152             2.0250             4.2756           183.6351
     24.615405900940     -1.710188908050                 aaL/CE           63702            15.9591          7892.8889             0.5846             1.9406             3.6405           184.5809
     24.591052441206      0.000057483286                aaP>**C          298536            18.1875          7887.3243             0.6109             1.9722             4.8793           162.1010
     23.353878876751      0.000812265829                aaR\</C          560412            19.0961          7492.3374             0.4722             1.9788             5.0291           176.5792
     23.353878876751      0.000812265829                aa\R</C          560444            19.0962          7492.3375             0.4722             1.9788             5.0291           176.5773
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_cos/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.99998113604694894        9.9998118354350423E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     28.262647188237      0.218341713655                      P               1             0.0000          9044.0471             0.7172             1.6851             2.2394           320.0000
     27.269237867912     -1.148702173019                     a<               6             2.5850          8728.7411             0.5446             1.3393             2.6101           320.0000
     27.258949913397     -1.274621792107                    a<S             130             7.0224          8729.8863             0.5577             1.3711             2.6374           290.1615
     26.799784417431     -0.984340427353                    aLS             142             7.1497          8583.0808             0.5588             1.3378             3.2754           291.3521
     26.600798841855     -1.039610209609                   a>EC            1748            10.7715          8523.0271             0.6190             2.0396             2.6948           278.3598
     26.315322613203     11.381352324195                  aa>C*            2760            11.4305          8432.3337             1.2345             3.5527             4.1833           265.6322
     25.848415524447      1.004105654538                  aa</C            4492            12.1331          8283.6261             0.3747             1.0259             3.2198           271.6398
     25.399288748544      0.972881583243                  aa+ES            5788            12.4988          8140.2712             0.5434             1.7990             3.3852           256.3184
     25.399288748544      0.972881583243                 aEaE*S           99058            16.5960          8144.3684             0.5434             1.7990             3.3852           198.1727
     25.265708874016      0.999493305297                 aL\>>S          217082            17.7279          8102.7547             0.3546             0.9740             3.7883           189.9270
     23.554132181070      1.000327067435                aaR\</C          560412            19.0961          7556.4184             0.4723             1.9799             4.7249           187.5382
     23.554132181070      1.000327067435                aa\R</C          560444            19.0962          7556.4185             0.4723             1.9799             4.7249           187.5349
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
46.51 28.45 tan(-2.356194577615+pi)
48.31 28.1 acos(0.218341713655*pi)
51.8 28.1 acos(-2.455651998333+pi)
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
61.92 24.44 -3.490111211605*(x0*log(((-x0)+1)))
66.92 22.28 -3.736255965319*(x0/(x0-(sin(x0))**(-1)))
70.06 22.22 -7.488673134239*log(cos((sin(x0)/cos(x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_exp/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     32.288553498528     -0.423310912554                      P               1             0.0000         10332.3371          1838.6876         19611.3190             4.2138           320.0000
     32.152946982187      2.249550488459                      a               2             1.0000         10289.9430          1838.6010         19610.8880             4.2756           320.0000
     31.797298447578      3.684289236629                     aL              18             4.1699         10179.3054          1838.5113         19610.4586             4.4814           320.0000
     31.736115943261      1.245718853230                    aP*              26             4.7004         10160.2575          1838.4157         19609.9649             4.4838           320.0000
     31.541329517716      2.162232578673                    a\S             134             7.0661         10100.2915          1838.6137         19610.9788             4.7721           305.7164
     31.517602828389     -1.625439110513                    a>E             182             7.5078         10093.1407          1838.2223         19608.9785             4.6019           298.9670
     30.868737640710     -1.965505560204                    aEE             198             7.6294          9885.6254          1837.3237         19604.3096             5.0133           298.0909
     30.785816538284      0.704464701631                  aaEE*            2864            11.4838          9862.9451          1837.0411         19602.8117             5.0495           285.9647
     30.739128083379     -2.589756075197                  Pa~>/            3199            11.6434          9848.1644          1834.1239         19585.2864             5.1007           286.8168
     30.042469512902      2.099766383912                  PaL/S            4371            12.0937          9625.6840          1838.8046         19610.9428             6.0362           289.8286
     30.032887426184     -0.050558088416                  aL\C\           15536            13.9233          9624.4473          1839.3859         19615.0888             6.5686           285.0342
     29.802856216752     -0.637288079104                  aL\E\           15860            13.9531          9550.8671           657.1571          6685.2778             4.8781           284.0923
     29.691020605822     -2.222102824345                 Paa+C/           25457            14.6358          9515.7624          1875.3042         19630.1152             5.6001           269.9809
     29.327833222557      1.025863359929                 PaL>*E           50237            15.6165          9400.5231          1835.7820         19596.4056             6.2212           270.8615
     28.854620421147      0.000692984996                 aL>EC\          200828            17.6156          9251.0941          1840.4301         19615.3395             8.1471           266.9091
     28.854620421147      0.000692984996                aPCE/C\          640626            19.2891          9252.7677          1840.4301         19615.3395             8.1471           259.4229
     28.717724158272     -0.220976980203                aaE*E<E          828484            19.6601          9209.3318          1413.5682         16189.6894             4.8807           256.9217
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_exp/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   19614.037310688072        19.614038242304854     
         237  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     31.924338030335      1.001183671976                      P               1             0.0000          2649.7201           371.7827          3104.9287             4.4618            83.0000
     31.056255360609      8.804126447323                      a               2             1.0000          2578.6692           370.9226          3100.3801             4.7297            83.0000
     30.723905270789      6.935263128162                    aE<              72             6.1699          2556.2541           370.5668          3098.3907             4.9076            78.4583
     30.640745661270     -2.620299205961                    aL\             106             6.7279          2549.9098           369.0945          3088.6329             4.9139            79.1509
     30.571557228143      6.068570870686                   aa>*             238             7.8948          2545.3341           370.5178          3098.1360             5.0443            75.4370
     30.361639726552      0.779706462941                   aP*E             476             8.8948          2528.9109           370.1731          3095.9326             5.1083            76.1198
     29.721921761204      0.045538460528                   a>EE            2072            11.0168          2477.9363           367.1370          3077.3668             5.3361            71.4141
     29.358763425400     -0.940608756574                  aaC-\            4044            11.9816          2448.7589           376.9237          3112.1271             5.8880            74.0351
     29.156353224789     -0.922589956581                  aE<<\           14692            13.8427          2433.8201           373.9300          3110.4023             6.2390            72.5278
     28.972784323655      0.192714006581                 PaEC\+           29073            14.8274          2419.5685           372.8170          3107.7309             7.9950            70.0661
     28.644571351830     -0.553072460198                 aP\<+\           43452            15.4071          2392.9066           374.7844          3110.9514             6.2978            70.3841
     28.565280316841     -0.802689937277                 aaRC-\           44286            15.4346          2386.3528           382.1956          3110.9413             6.3636            70.4737
     27.614984153372     -0.986626773537                 PaE/C\           57225            15.8044          2307.8480           374.9534          3111.9154             7.2753            70.6284
     26.909089638762      0.333721119965                 aaE*EE           63922            15.9640          2249.4185           228.2149          1988.4833             5.0493            69.9309
     24.257693499782      0.008141758212                PaC/ERE          832435            19.6670          2033.0555           260.9343          2256.6216             7.1422            66.1337
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
46.51 28.45 tan(-2.356194577615+pi)
48.31 28.1 acos(0.218341713655*pi)
51.8 28.1 acos(-2.455651998333+pi)
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
61.92 24.44 -3.490111211605*(x0*log(((-x0)+1)))
66.92 22.28 -3.736255965319*(x0/(x0-(sin(x0))**(-1)))
70.06 22.22 -7.488673134239*log(cos((sin(x0)/cos(x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_inverse/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     30.043246248873     -2.184367279520                      P               1             0.0000          9613.8388            12.1788            82.7961             2.8872           320.0000
     29.660104924262      1.434537791493                     a~               8             3.0000          9494.2336            12.0459            82.3785             3.0078           320.0000
     27.481507091519     -1.034888529827                     a\              10             3.3219          8797.4042             9.2175            68.0240             3.7364           320.0000
     27.040005196257     -1.180571083300                    aS\             102             6.6724          8659.4741             9.2570            68.1597             4.1161           270.5490
     26.630874663557      1.145620675535                  PaR/C            4503            12.1367          8534.0166            12.0510            81.6514             4.8439           230.8577
     26.313042578846      0.880834378232                  a\<<S           17598            14.1031          8434.2767            12.1849            82.0628             5.3629           220.7774
     26.277373462804     -1.138220105652                 aaa*S/           25434            14.6345          8423.3940             9.2492            68.1273             4.9257           217.6189
     26.198739018462     -1.733179360181                 aaCS*\           43934            15.4231          8399.0195             8.7643            65.5411             4.5524           216.4436
     25.607145894790     -3.984824550839                 aa\+RE           63290            15.9497          8210.2364             3.4523            27.2952             3.7134           204.7154
     24.831754646556      0.045925394643                 aR\<a/          150170            17.1962          7963.3577             3.6302            31.8316             3.7748           125.5694
     24.808797189344     -1.232332772497                 a>CEC\          200922            17.6163          7956.4314           121.1190          2114.7653             4.9481           107.4442
     24.220088455122     -1.308671671427                 aE<\ER          216076            17.7212          7768.1495           310.8343          3325.4941             6.3293           104.6144
     24.220088455121     -2.308671671427                aE<\ER>         2224974            21.0854          7771.5137           310.8343          3325.4941             6.3293           114.0442
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_inverse/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   83.753363634796514        8.3753367612867821E-002
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     30.043246248873      0.304694319221                      P               1             0.0000          9613.8388            12.1788            82.7961             2.8872           320.0000
     29.138919833376     -1.882286826405                     a<               6             2.5850          9327.0393            11.9226            81.9834             3.1974           320.0000
     28.629674022476     -1.319739122091                     aL              18             4.1699          9165.6656            11.4626            80.0327             3.3953           320.0000
     27.398898018259      0.899447931172                    a\<              62             5.9542          8773.6016             9.5279            69.5742             3.9610           303.5484
     26.591674604605     -0.673260524589                   aLa/             628             9.2946          8518.6305             6.5551            51.9332             3.6270           254.7723
     25.983106067196      0.282658839531                  aa*\<            5136            12.3264          8326.9204             0.6451             4.5972             2.7691           144.7155
     25.101698077374     -0.128833574154                  aCL\>           10746            13.3915          8045.9349             1.0735            11.5100             2.7257           102.1870
     24.865649833198     -0.252737862569                 aaa*\-           25082            14.6144          7971.6223             1.2293            12.7386             2.9412            71.0611
     24.865649833198     -0.252737862569                 aa\a/-           27542            14.7493          7971.7573             1.2293            12.7386             2.9412            69.6096
     22.943232774258      0.267647615496                 aaS*\<           54118            15.7238          7357.5583             0.7565             8.7563             3.0734            60.1574
     22.943232774258      0.267647615496                 a\aS/<           94404            16.5266          7358.3610             0.7565             8.7563             3.0734            46.8253
     22.943232774258      0.267647615496                 aS\a/<          130570            16.9945          7358.8290             0.7565             8.7563             3.0734            42.0049
     22.921731368642     -0.267663131080                aaS\-a/          596056            19.1851          7354.1391             0.7561             8.7520             3.1034            30.1164
     22.921731368642     -0.267663131080                aaS~*\>          600880            19.1967          7354.1508             0.7561             8.7520             3.1034            30.1236
     22.702604383389     -0.132868591267                PRaC<\+         1057647            20.0124          7284.8458             0.8088             9.2836             2.4686            28.8104
     22.702604383389     -0.074963074130               PPRaC</+         4322387            22.0434          7286.8768             0.8088             9.2836             2.4686            18.6192
     22.602384972210      0.264420085297               aa*\PR<-        11437430            23.4473          7256.2104             0.8475             9.6446             2.7203            16.4864
     22.531210184803     -0.264446082481               PRaa*\>-        13246869            23.6591          7233.6464             0.8467             9.6373             2.8002            17.3871
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
46.51 28.45 tan(-2.356194577615+pi)
48.31 28.1 acos(0.218341713655*pi)
51.8 28.1 acos(-2.455651998333+pi)
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
61.92 24.44 -3.490111211605*(x0*log(((-x0)+1)))
66.92 22.28 -3.736255965319*(x0/(x0-(sin(x0))**(-1)))
70.06 22.22 -7.488673134239*log(cos((sin(x0)/cos(x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_log/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     29.777964587702     -3.141592741013                      P               1             0.0000          9528.9487             1.6416             4.4279             2.2432           320.0000
     29.494619831202     -0.468731340000                      a               2             1.0000          9439.2783             1.4020             4.0188             2.2500           320.0000
     29.030037689047      0.757725510490                     aL              18             4.1699          9293.7820             0.9552             2.3664             2.2145           320.0000
     28.564575823197     -1.472562975229                    aP*              26             4.7004          9145.3647             0.9079             3.1427             2.3075           320.0000
     26.628915016633     -4.436239806717                    a>E             182             7.5078          8528.7606             0.7091             2.8770             3.0581           291.6483
     26.628915016633     -3.436239806717                   a>E<             938             9.8734          8531.1262             0.7091             2.8770             3.0581           167.8081
     26.628915016633     -7.577832547730                  Pa>E+            2507            11.2917          8532.5446             0.7091             2.8770             3.0581           139.0901
     25.915914012407     -2.484548978718                  aP>>*            2542            11.3117          8304.4042             0.4916             2.2500             2.9540           139.3281
     25.729467937191     -2.258020472714                  aPER*            2718            11.4083          8244.8381             0.5747             2.4568             3.3960           136.4573
     25.632691832931     -2.328856832847                 aPPR+*           23564            14.5243          8216.9857             0.5478             2.3921             3.4766           109.4069
     25.539570728909     -5.866703212812                 aaR>E+           30462            14.8947          8187.5574             0.4748             2.0911             3.3006           111.4115
     25.532569056427     -3.107742573398                 aaC>E*           33386            15.0270          8185.4491             0.4147             1.7601             3.8263           108.9485
     25.321508351128      5.335282502034                 Pa<E~/           37541            15.1962          8118.0789             0.3487             1.7179             3.1661           109.5224
     25.275909210231      5.319164397485                 Pa>-E~           56149            15.7770          8104.0679             0.3522             1.7270             3.2702            94.7424
     24.831992624254     -0.727105731860                 aP*aL+           64240            15.9712          7962.2088             0.2207             1.0689             3.0289            90.2873
     24.831992624254     -0.727105731860                aaP*E*L          321640            18.2951          7964.5327             0.2207             1.0689             3.0289            61.0389
     24.690468785697    -13.975890442520                PaRE\-E          581651            19.1498          7920.0998             0.2345             1.0248             3.9417            58.0671
     24.690468785695    -13.975890442520                PaR~E-E          583055            19.1533          7920.1033             0.2345             1.0248             3.9417            58.1250
     24.678902700513      2.072542433870                aLaR>>*         1074754            20.0356          7917.2844             0.1386             0.5298             2.7522            63.1375
     24.105032279971      2.268692606316                aLaRE>*         1077346            20.0390          7733.6494             0.1018             0.4006             2.6682            63.1306
     23.939347467190      2.322013929269               PaaRR\-*         3306525            21.6569          7682.2481             0.1495             0.5804             4.1840            40.2071
     23.864935729172      1.505020954187               aaLaE>*+         4310234            22.0393          7658.8188             0.0542             0.2515             2.2583            45.1048
     22.605194930300      1.318026062707               aaS\a-/L         5150790            22.2964          7255.9587             0.0208             0.1104             2.2713            42.5105
     22.605194930300      1.318026062707               aaS*\<L~        10279386            23.2933          7256.9556             0.0208             0.1104             2.2713            30.0338
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_log/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   4.4278763327022128        4.4278765430150529E-003
           2  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
45.97 30.06 exp(-3.141592741013+pi)
46.51 28.45 tan(-2.356194577615+pi)
48.31 28.1 acos(0.218341713655*pi)
51.8 28.1 acos(-2.455651998333+pi)
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
61.92 24.44 -3.490111211605*(x0*log(((-x0)+1)))
66.92 22.28 -3.736255965319*(x0/(x0-(sin(x0))**(-1)))
70.06 22.22 -7.488673134239*log(cos((sin(x0)/cos(x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sin/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     28.226300576574     -2.801148117391                      P               1             0.0000          9032.4162             0.5391             1.3402             2.1344           320.0000
     27.511636672822     -0.010022900085                      a               2             1.0000          8804.7237             0.6320             1.7780             2.5021           320.0000
     27.425254256786     -0.237801349044                     aR              12             3.5850          8779.6663             0.5864             1.6498             2.6007           314.7500
     27.304363400191      1.558794225181                     aL              18             4.1699          8741.5662             0.8978             2.3207             3.1202           316.5000
     27.052756436669     -1.060982843232                     aE              20             4.3219          8661.2040             0.7795             2.1402             3.1601           316.8500
     26.736513647646     -0.230366824236                    aa+              24             4.5850          8560.2693             0.8667             2.3472             3.1420           317.3750
     26.724214117982     -0.226465914220                   aaS+             222             7.7944          8559.5429             0.8293             2.2710             3.1746           288.8739
     26.588894455099     -1.283617183404                   aaE+             234             7.8704          8516.3166             1.0518             2.7090             3.4651           290.4701
     26.581129605125     -0.589426142157                   PaS*             257             8.0056          8513.9671             1.0192             2.6400             3.9789           291.6303
     26.564557143731     -1.094192244778                   a<\~            1012             9.9830          8510.6413             2.5357             9.3251             4.5232           293.0040
     26.517483987472     -1.089872144588                   aE<E            1962            10.9381          8496.5330             1.3619             3.6551             3.9588           275.3206
     26.514422100905     -0.334733383232                  aa>>*            2544            11.3129          8495.9280             1.1364             2.8696             3.8180           277.2174
     26.473458290099      2.386809116753                  Pa<S*            2727            11.4131          8482.9198             1.0619             2.7309             3.6193           277.2204
     26.418192062730     -0.157579848368                  aaRE*            2848            11.4757          8465.2972             1.0801             2.7639             3.5603           276.8353
     26.415934471530      0.935981833117                  Pa>*C            4415            12.1082          8465.2072             1.0523             2.7236             3.5041           276.5807
     26.415932858450      0.935982007518                  Pa<*C            4419            12.1095          8465.2080             1.0523             2.7236             3.5041           276.6058
     26.279216059832      0.995586958228                  PaE/C            4519            12.1418          8421.4909             0.7687             2.1374             3.9646           277.3007
     25.948381289038      0.472155308601                  a<\C~           14066            13.7799          8317.2619             0.6592             1.8032             3.6440           272.3502
     25.907280550676      0.911797181482                  aL<CS           18416            14.1687          8304.4984             0.8085             2.2326             3.9488           253.8573
     25.840008593162     -1.290440236827                 PaCES*           32701            14.9970          8283.7998             0.9563             2.5349             4.2339           251.1916
     25.653042057296      5.796938708714                 PaCC~/           37489            15.1942          8224.1676             1.0294             2.6742             4.1032           251.3415
     25.639921413521      0.371965380941                 aP*C>C           75328            16.2009          8220.9758             0.8645             2.3491             3.8485           237.1899
     25.350752029055     -1.818097738727                 aL\CCE          266168            18.0220          8130.2626             0.5054             1.7759             3.2613           209.0036
     25.043766225940     -0.005343323509                aaP>**S          297384            18.1820          8032.1872             0.5505             1.5551             3.8582           207.1999
     24.831022014485      0.934151807617                aa>ESC-          448148            18.7736          7964.7007             0.6081             1.7679             3.7915           206.1300
     24.305120662781     -0.004728901107                aaR\</S          548748            19.0658          7796.7044             0.5500             1.8584             3.8763           199.6645
     24.305120662781     -0.004728901107                aa\R</S          548780            19.0659          7796.7045             0.5500             1.8584             3.8763           199.6600
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sin/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
  0.99974928191095069        9.9974932939649345E-004
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     28.226300576574      0.108366886381                      P               1             0.0000          9032.4162             0.5391             1.3402             2.1344           320.0000
     27.559307075310      0.958980771128                      a               2             1.0000          8819.9783             0.6250             1.7557             2.4622           320.0000
     27.558237409974     -0.961183044491                     a~               8             3.0000          8821.6360             0.6255             1.7575             2.4633           320.0000
     27.512162508917      1.000648537049                     aS              14             3.8074          8807.6994             0.6068             1.7094             2.5203           320.0000
     26.122268405646      3.726014394469                    aa*              28             4.8074          8363.9332             1.3859             3.4597             4.1910           320.0000
     25.739764669822     -7.601786462532                    aC<              68             6.0875          8242.8122             1.3432             3.3183             4.5822           305.0000
     25.541818560308      3.821906620938                   aaS*             258             8.0112          8181.3932             1.2832             3.1490             4.8564           293.2287
     25.524823705591     -3.822425580895                  aaS~*            2636            11.3641          8179.3077             1.2834             3.1493             4.8874           278.0895
     25.434011176379      2.431688747455                  PaC*S            4295            12.0684          8150.9520             1.1693             2.9492             4.8368           280.3700
     25.314826603796      1.906881571321                 aaa+*S           26226            14.6787          8115.4232             1.0877             2.8059             4.8494           262.1776
     25.096505329181      1.223578989569                 aaP**S           26230            14.6789          8045.5606             0.7555             2.1410             4.3381           262.1816
     24.847473291821      0.648899445308                 PaE*C>           53265            15.7009          7966.8924             0.7792             2.1816             4.1277           245.5690
     23.916536378552     -0.488488933522                 aEE<S<          172138            17.3932          7670.6848             0.3403             1.3981             3.7562           221.9928
     23.908324096405      0.488472995877                aEE<S~>         2194158            21.0652          7671.7289             0.3403             1.3980             3.7775           113.9158
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
44.62 27.57 asin(-0.010022900085+x0)
51.2 27.56 asin(-0.961183044491*(-x0))
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
55.63 24.03 asin(-1.089872144588+exp((exp(x0)-1)))
56.44 22.27 asin(3.821906620938*(x0*sin(x0)))
56.44 22.26 asin(-3.822425580895*(x0*(-sin(x0))))
61.4 22.2 asin(2.431688747455*sin((pi*cos(x0))))
62.22 22.11 asin(1.906881571321*sin((x0*(x0+x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sqrt/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     28.738098446376     -2.141592741013                      P               1             0.0000          9196.1915             0.8221             2.1439             2.1958           320.0000
     28.065692594348      0.531268660000                      a               2             1.0000          8982.0216             0.5874             1.7129             2.2171           320.0000
     27.585468655305      1.978654246837                     aL              18             4.1699          8831.5199             0.4049             1.2709             2.1853           309.3889
     27.467023328038     -0.597965631634                     aE              20             4.3219          8793.7694             0.4112             1.2828             2.2351           310.4500
     26.559836917669      0.062537320000                    aa+              24             4.5850          8503.7328             0.3728             1.2818             2.3986           312.0417
     24.997574724938     -1.025923306755                   aaE+             234             7.8704          8007.0943             0.1940             0.8110             2.6158           229.1154
     24.997574724938     -0.025923306755                  aaE<+            2288            11.1599          8010.3838             0.1940             0.8110             2.6158            94.1967
     24.957866538337     -1.016707988494                  aaSE+            2528            11.3038          7997.8211             0.2834             1.0724             3.0364            94.5882
     23.800570961124      0.080223065287                  aaRE*            2848            11.4757          7627.6584             0.1713             0.7405             3.0984            98.2728
     23.453891619356      0.029912879290                 aa>ER*           32354            14.9817          7520.2270             0.1896             0.7877             3.3734            66.6213
     23.300023213695     -1.548606424932                 aP<\+E           49996            15.6095          7471.6170             0.1858             0.7701             3.7606            65.3299
     22.982286159543     -0.935161437451                 aEa>R*           84514            16.3669          7370.6985             0.1592             0.6897             3.8857            67.1272
     22.804754282492     -1.901974002391                aaEE>R+          388240            18.5666          7316.0880             0.1281             0.5833             3.3978            64.8586
     22.799109853864     -0.009546314679                a>a~>/L         1243796            20.2463          7315.9615             0.0470             0.2115             2.6480            57.0977
     22.402638035472     -1.194595566027                aSREaC/         1944438            20.8909          7189.7351             0.0911             0.4418             3.3820            48.5022
     22.182454953246      0.003210645227                a\E<RL\         2612594            21.3171          7119.7026             0.0628             0.3328             3.3019            47.8797
     21.777597649288      0.007612934622               aPaL\-R*         3397844            21.6962          6990.5274             0.0160             0.0593             2.6062            46.3921
     20.733325935993      0.001813948452               aaCR\CS/         6113758            22.5436          6657.2079             0.0096             0.0779             2.0026            38.1041
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_sqrt/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   3.1438830732389271        3.1438832225653603E-003
           0  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     28.738098446376      0.318309877326                      P               1             0.0000          9196.1915             0.8221             2.1439             2.1958           320.0000
     25.965879632919      2.133418260447                      a               2             1.0000          8310.0815             0.3477             1.2243             2.5891           320.0000
     24.753686319123      1.740444227454                    aE<              72             6.1699          7927.3495             0.1280             0.6046             2.3497           164.3750
     22.975242533949      1.918879523407                   aaC/             334             8.3837          7360.4613             0.0680             0.3672             2.5355           113.9281
     22.969206886973     -1.919196298770                  aaC~/            3288            11.6830          7361.8292             0.0679             0.3667             2.5710            51.1390
     22.722055514207      1.935616537864                  aaSC/            3428            11.7432          7282.8009             0.1572             0.6864             3.9281            52.0216
     22.668628336387     -1.936880827830                 aaC<<*           31154            14.9271          7268.8882             0.1760             0.7421             4.0817            68.9273
     22.456647307855      1.781715944838                 aa<EC/           38838            15.2452          7201.3723             0.1266             0.5498             4.1727            74.9299
     21.776344574797      3.884415195466                 aC\<a/          150174            17.1963          6985.6265             0.1139             0.5180             4.0375            71.8415
     21.587424040880      0.524415095951                aaC\E>*          405224            18.6284          6926.6041             0.0630             0.3156             3.4464            63.3260
     21.058787235728      0.590910184167                aaCS\E*          427004            18.7039          6757.5158             0.0279             0.1844             2.8509            63.0403
     20.816805500032     38.925091223055               aPEaEE-/         4391236            22.0662          6683.4440             0.0114             0.0844             2.3452            31.3823
     20.807216714659     -1.682112949762               aaEP-E</         4667970            22.1544          6680.4637             0.0114             0.0844             2.3772            30.8659
     20.807216714659    -38.925262147020               aaEEPE-/         4969218            22.2446          6680.5539             0.0114             0.0844             2.3772            30.2862
     20.262353970432      1.375649801528               aaCSSL>/         5986138            22.5132          6506.4665             0.0086             0.0677             2.9123            28.5857
     20.191986477694      1.002559685536               aaCR\CS/         6113758            22.5436          6483.9793             0.0083             0.0719             2.1339            28.6572
     19.791806772756      2.826791564328               aaCS\CE/         6192526            22.5621          6355.9403             0.0323             0.2023             3.2836            28.5117
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
44.62 27.57 asin(-0.010022900085+x0)
51.2 27.56 asin(-0.961183044491*(-x0))
51.93 26.85 (0.531268660000+x0)**2
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
55.63 24.03 asin(-1.089872144588+exp((exp(x0)-1)))
56.44 22.27 asin(3.821906620938*(x0*sin(x0)))
56.44 22.26 asin(-3.822425580895*(x0*(-sin(x0))))
61.4 22.2 asin(2.431688747455*sin((pi*cos(x0))))
62.22 22.11 asin(1.906881571321*sin((x0*(x0+x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     30.992152946741     -2.141592741013                      P               1             0.0000          9917.4889            20.8367            96.6935             3.0228           320.0000
     30.765214689338      0.531268660000                      a               2             1.0000          9845.8687            20.6720            96.2624             3.1126           320.0000
     30.511244063517      2.185140510418                     aL              18             4.1699          9767.7680            20.3923            95.6140             3.2641           320.0000
     30.422057928595      0.062537320000                    aa+              24             4.5850          9739.6435            20.5090            95.8314             3.2827           320.0000
     30.072878307728     -0.256674899114                    aP*              26             4.7004          9628.0215            20.2315            95.1235             3.5978           320.0000
     29.932598919599     -3.040289718441                    a>E             182             7.5078          9585.9394            19.8542            94.0495             3.5849           298.6209
     29.853534080643     -3.218108612304                    aEE             198             7.6294          9560.7603            18.2728            89.2183             3.5417           297.4495
     29.787697721814     -1.250536692692                   aa+E             474             8.8887          9540.9520            19.4817            92.8973             3.6539           304.2869
     28.403291513430      1.004972058688                   aEEC            1764            10.7846          9099.8379            20.9393            96.0461             5.1067           289.1729
     28.403291513430      0.004972058688                  aEEC>           11254            13.4581          9102.5114            20.9393            96.0461             5.1067           285.7869
     27.973876700955      1.005556630033                  aR<\S           17924            14.1296          8965.7701            20.8124            97.2437             5.4801           271.2573
     27.740898603397      0.849382755567                  aEECS           18544            14.1787          8891.2662            20.9921            96.2449             5.6344           271.1540
     27.740898603397     -2.292209985446                PaEECS+          393099            18.5845          8895.6721            20.9921            96.2449             5.6344           251.9250
     27.424501663419     -1.147183216738                Pa>ECE*          428059            18.7075          8794.5480            18.2941            90.9525             5.2805           250.5730
     26.765442050671    -15.155442993896                aa*C\EE         1006100            19.9403          8584.8818             8.1420            41.9173             4.8639           223.6102
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_squared/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   97.693471383423457        9.7693476023614362E-002
          87  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     31.055036080815      0.356946102026                      P               1             0.0000          7235.8234            21.0303            96.5721             3.2261           233.0000
     30.432389039759      2.336180655014                      a               2             1.0000          7091.7466            20.6524            95.5915             3.4900           233.0000
     29.743621994632      4.866988480450                    aa*              28             4.8074          6935.0713            20.0053            93.7533             3.8781           226.8214
     29.429091568992      0.023515144190                    a>C             146             7.1898          6864.1682            21.5433            97.7011             4.9480           212.3836
     29.425600018198     -0.000647690691                   aa<+             206             7.6865          6863.8513            21.5408            97.6940             5.0060           209.5534
     28.922547525119     61.541774347972                   aaS-             294             8.1997          6747.1532            18.9366            90.5188             4.3816           214.4048
     28.915988354101     11.756767435847                   a\E\            1268            10.3083          6747.7336            19.9478            93.8244             4.9194           211.5536
     28.907664339925     10.139445687984                  aaa**            2136            11.0607          6746.5465            18.8734            90.3077             4.3855           200.2411
     28.852062199968    -19.481350994352                  aaCL*            2820            11.4615          6733.9920            18.5990            89.3650             4.3976           202.7780
     28.363006275571     28.330128598388                  aa\E/            3492            11.7698          6620.3503            18.3721            89.3047             5.1963           203.3044
     27.553818511172    -42.434610524440                  aa*C<            5184            12.3399          6432.3796            17.0665            84.5307             5.2579           205.6339
     27.478148179497    -41.871418228121                  aa*CL            6048            12.5622          6414.9708            16.4532            82.1450             5.2555           202.7250
     27.266244970648   -156.145089297315                  aCLC<           12690            13.6314          6366.6665            15.9398            80.3971             5.3387           203.6121
     27.239498688235   -155.583726122185                  aCLCL           21438            14.3879          6361.1911            15.7015            79.4278             5.3362           190.6996
     26.297406760656      0.009225376162                 aPP**E           26612            14.6998          6141.9956             4.3307            31.3743             3.4721           192.8807
     26.297406760652      0.009225376162                 PaP**E           26613            14.6998          6141.9956             4.3307            31.3743             3.4721           192.8822
     26.107200266739      0.000049626935                 aRREEE          269420            18.0395          6101.0172             4.0290            29.6735             3.4696           106.6130
     26.093816102562    -26.211037730706                aaE<*C<          616408            19.2335          6099.0927            15.1754            78.1710             6.2612           102.2892
     25.713841478483    -25.818696701757                aaE<*CL          686392            19.3887          6010.7137            11.8171            62.4307             6.2396           109.3511
     25.138949659828      0.000000004863                PEaRR*E         1251011            20.2547          5877.6299            12.4763            67.8514             5.9917           137.8876
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
44.62 27.57 asin(-0.010022900085+x0)
51.2 27.56 asin(-0.961183044491*(-x0))
51.93 26.85 (0.531268660000+x0)**2
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
55.63 24.03 asin(-1.089872144588+exp((exp(x0)-1)))
56.44 22.27 asin(3.821906620938*(x0*sin(x0)))
56.44 22.26 asin(-3.822425580895*(x0*(-sin(x0))))
61.4 22.2 asin(2.431688747455*sin((pi*cos(x0))))
62.22 22.11 asin(1.906881571321*sin((x0*(x0+x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Checking for brute force + 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_tan/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Shuffling mystery data..
 Searching for best fit...
     29.013487161757     -2.925977602410                      P               1             0.0000          9284.3159             5.2545            44.8645             2.9065           320.0000
     28.247700539552     -0.046622486198                      a               2             1.0000          9040.2642             5.2764            45.3906             3.7425           320.0000
     28.103206079656     -1.066014957760                     aE              20             4.3219          8997.3479             5.3066            45.7825             4.0509           316.8500
     28.098580529817     -1.062302036244                    aSE             192             7.5850          8999.1307             5.2922            45.6189             3.9604           296.4271
     28.048819745700     -0.080273931874                   aa>*             238             7.8948          8983.5171             5.3250            45.9783             4.1620           299.1134
     27.521905810910      1.094196573790                   aEEC            1764            10.7846          8817.7945             5.3398            44.8231             4.0219           286.9819
     27.512356661454     -8.523965476914                  PaC-E            4763            12.2177          8816.1718             5.5681            47.5584             4.9908           281.7445
     27.280920376952     -5.569693814117                  aCCEE           23202            14.5020          8744.3965             5.5744            47.5928             5.3786           263.5105
     27.140183501103     -4.810261503522                 PaC/ER           58801            15.8436          8700.7023             6.0101            49.1193             5.9486           268.5404
     26.057783561723      0.956911707308                 PRa</S           99445            16.6016          8355.0924             5.3474            44.7374             5.9159           271.6848
Checking for brute force * 

Trying to solve mysteries with brute force...
Trying to solve results/mystery_world_tan/kinetic.txt_train-mult_b
Rejection threshold.....    10.000
Bit margin..............     0.000
Number of variables.....       1
Functions used..........        +*-/><~\RPSCLE
 Arity            0 : Pa
 Arity            1 : ><~\RSCLE
 Arity            2 : +*-/
Loading mystery data....
         320  rows read from file mystery.dat                                                                                                                                                                                                                                                     
Number of examples......     320
Removing problematically
   44.648872018778576        4.4648874139486198E-002
          19  out of          320  data points discarded for being too close to zero
Shuffling mystery data..
 Searching for best fit...
     29.032449915152      0.071225094270                      P               1             0.0000          8738.7674             5.3793            44.8726             2.9482           301.0000
     28.583037808708      0.803643539211                      a               2             1.0000          8604.4944             5.3947            45.2824             3.4312           301.0000
     27.524134687912      3.859495760479                    aa*              28             4.8074          8289.5719             5.5951            47.0473             5.2392           301.0000
     27.479877139811     -7.686159285443                    aCL             176             7.4594          8278.9025             5.6489            47.3351             5.3675           276.3466
     27.370047834285      7.639187896357                   aC\<             860             9.7482          8248.1326             5.7593            47.8447             5.6617           280.6698
     26.763864288451      3.560063100434                  aaE<*            2612            11.3509          8067.2741             5.7907            48.0157             6.3450           264.7094
     26.666958993220      3.579015683404                 aaSE<*           31402            14.9386          8041.6932             5.6895            47.5613             6.4682           253.8516
     26.576654324249      3.581259442276                 aaE<S*           32458            14.9863          8014.5592             5.6312            47.2798             6.5599           253.6116
     26.495188691987      4.187388282319                aaaES**          274196            18.0648          7993.1166             5.5409            46.7532             6.5292           236.7545
     26.421239196983    -25.441704609774                aaCC*C<          616580            19.2339          7972.0269             6.0723            49.0978             6.9160           241.9467
Checking polyfit 

Pareto frontier in the current branch:

Complexity #  MDL Loss #  Expression
44.62 27.57 asin(-0.010022900085+x0)
51.2 27.56 asin(-0.961183044491*(-x0))
51.93 26.85 (0.531268660000+x0)**2
52.21 24.57 0.483305784300*(x0*exp((x0*pi)))
55.63 24.03 asin(-1.089872144588+exp((exp(x0)-1)))
56.44 22.27 asin(3.821906620938*(x0*sin(x0)))
56.44 22.26 asin(-3.822425580895*(x0*(-sin(x0))))
61.4 22.2 asin(2.431688747455*sin((pi*cos(x0))))
62.22 22.11 asin(1.906881571321*sin((x0*(x0+x0))))
112.44 19.48 7.566913381123*((sqrt(((x0*(-x0))+1)))**(-1)-1)

Just one variable!
Checking for symmetries...
kinetic.txt_train-mult_b just one variable for ADD 

kinetic.txt_train-mult_b just one variable for ADD 

kinetic.txt_train-mult_b just one variable for ADD 

kinetic.txt_train-mult_b just one variable for ADD 


Checking for separabilities...
kinetic.txt_train-mult_b just one variable for ADD
kinetic.txt_train-mult_b just one variable for ADD

Checking for compositionality...

Checking for generalized symmetry...

run_aifeynman termine en 2118.3 s

Lecture des résultats. Le fichier liste les candidates du front de Pareto, complexité croissante. Les colonnes : erreur sur le jeu de test, log₂ de l’erreur d’entraînement, la même multipliée par N, complexité en bits, erreur d’entraînement, puis l’expression SymPy (x0 = m, x1 = v). L’échelle d’erreur du paquet est log₂(1+|e|·2³⁰) : 25 bits ≈ 3 % d’erreur absolue, 20 bits ≈ 0,1 %. Deux mises en garde de lecture : les constantes numériques approximatives portent l’essentiel des bits (chaque réel non « snappé » coûte ~log(r/ε) ; l’étape snap du paquet tente de raccrocher les constantes aux rationnels, parfois sans succès — comparer aux 13,6 bits de mv²/2 dans l’encodage propre du papier), et la tête du front contient une formule dégénérée à ~0 bit (artifact du filtre NaN du solveur) que l’œil écarte immédiatement. Pendant la recherche, chaque candidate est en outre testée point par point dans un ordre aléatoire et rejetée statistiquement dès que z = √m·(d̄−d*)/σ dépasse ν = 10 « sigmas » (Eq. 4 du papier) — la quasi-totalité des candidates meurt après une poignée de points (exercice 1). Les familles attendues sur ce cas, hiérarchie de la figure 1 du papier : l’approximation classique v² (la famille mv²/2), des formules séparées x0×h(x1) produites par le module de séparabilité du paquet, la forme intermédiaire mc²(1/cos(v/c) − 1) — développement d’ordre 4 que la base d’opérations favorise — et, au bout du front si le budget le permet, la forme relativiste exacte.

import sympy as sp

sol_path = os.path.join(RUN_DIR, "results", "solution_kinetic.txt")
rows = []
with open(sol_path) as f:
    for line in f:
        parts = line.split()
        rows.append({
            "erreur_test": float(parts[0]),
            "log2_erreur": float(parts[1]),
            "complexite_bits": float(parts[3]),
            "erreur_paquet": float(parts[4]),
            "formule": " ".join(parts[5:]),
        })
sol = pd.DataFrame(rows).sort_values("complexite_bits").reset_index(drop=True)

print(f"Front de Pareto : {len(sol)} candidates, "
      f"{sol['complexite_bits'].min():.1f} a {sol['complexite_bits'].max():.1f} bits\n")
print("--- tete du front (les moins couteuses) ---")
for _, row in sol.head(6).iterrows():
    try:
        expr = sp.nsimplify(sp.sympify(row["formule"]), rational=False)
    except Exception:
        expr = row["formule"]
    print(f"{row['complexite_bits']:7.1f} bits | err test {row['erreur_test']:8.4f} | {expr}")
print("--- bout du front (les plus precises) ---")
for _, row in sol.tail(4).iterrows():
    try:
        expr = sp.nsimplify(sp.sympify(row["formule"]), rational=False)
    except Exception:
        expr = row["formule"]
    print(f"{row['complexite_bits']:7.1f} bits | err test {row['erreur_test']:8.4f} | {expr}")
Front de Pareto : 25 candidates, 0.0 a 163.5 bits

--- tete du front (les moins couteuses) ---
    0.0 bits | err test  26.9378 | 0
   46.2 bits | err test  26.4084 | x1 - 104561/500000
   46.4 bits | err test  25.2659 | x1**2 - 2807507429/250000000000
   47.7 bits | err test  25.2298 | x1*sin(x1) - 2172970393/250000000000
   49.8 bits | err test  25.3471 | asin(x1**2 - 13163168761/1000000000000)
   49.9 bits | err test  25.2621 | tan(x1**2 - 6941804681/500000000000)
--- bout du front (les plus precises) ---
  109.7 bits | err test  19.7366 | 66039915469*x0*asin(1906881571321*sin(2*x1**2)/1000000000000)/500000000000
  119.3 bits | err test  19.7400 | (x0/(2 + pi**(3/2)) - 65453019/1000000000000)*asin(1906881571321*sin(2*x1**2)/1000000000000)
  123.6 bits | err test  19.7372 | (x0*exp(-sqrt(-1 + sqrt(pi)))/pi - 12174789/100000000000)*asin(1906881571321*sin(2*x1**2)/1000000000000)
  163.5 bits | err test  16.1656 | 66039915469*x0*(-7566913381123/1000000000000 + 7566913381123/(1000000000000*sqrt(1 - x1**2)))/500000000000

3. Le cœur de l’algorithme : des symétries lues dans les gradients

La force d’AI Feynman 2.0 n’est pas la brute force, mais ce qu’elle sait déduire de la forme de la fonction avant même de chercher une formule. La méthode se joue en deux temps : (1) entraîner un réseau fNN à interpoler la table ; (2) faire des expériences numériques sur fNN — qui est lisse et différentiable, contrairement à la table. La table 1 du papier catalogue ces tests (positivité, séparabilités, symétries, compositionnalité, « snaps » des constantes vers 0 ou les rationnels…).

Nous implémentons le test de séparabilité : f(x₁,x₂) est-elle de la forme g(x₁)·h(x₂) ? L’astuce : si c’est le cas, log|f| = log g(x₁) + log h(x₂) est additivement séparable, ce qui se détecte par les dérivées croisées. Le score du papier (Eq. 6, Supp B) :

S[f] = |f_xy|² / (|f_xx · f_yy| + |f_xy|²)

vaut 0 si et seulement si f est additivement séparable ; le seuil de décision est S* = 0,1. Ces tests passent par des dérivées secondes — c’est pourquoi le réseau utilise des activations tanh : avec ReLU (linéaire par morceaux), f_xx est nul partout sauf aux points de rupture, et le test est aveugle.

# Etape 1 : le reseau du papier (128/128/64/64, tanh), 2000 epochs Adam.
# Le reseau est caste explicitement en float64 (autograd fin sur les derivees
# secondes) sans toucher au dtype par defaut -- le NN interne d'aifeynman,
# lui, exige float32.
X = torch.tensor(data[["m", "v"]].values, dtype=torch.float64)
Y = torch.tensor(data["E"].values, dtype=torch.float64).unsqueeze(1)

net = torch.nn.Sequential(
    torch.nn.Linear(2, 128), torch.nn.Tanh(),
    torch.nn.Linear(128, 128), torch.nn.Tanh(),
    torch.nn.Linear(128, 64), torch.nn.Tanh(),
    torch.nn.Linear(64, 64), torch.nn.Tanh(),
    torch.nn.Linear(64, 1),
).double()
opt = torch.optim.Adam(net.parameters(), lr=1e-2)
sched = torch.optim.lr_scheduler.StepLR(opt, step_size=1500, gamma=0.3)
for epoch in range(4000):
    opt.zero_grad()
    loss = torch.nn.functional.mse_loss(net(X), Y)
    loss.backward()
    opt.step()
    sched.step()
print(f"MSE finale du reseau : {loss.item():.3e}")

# Etape 2 : score S[f] (Eq. 6) sur une grille, par autograd.
def score_S(f_vals):
    g1 = torch.autograd.grad(f_vals.sum(), pts, create_graph=True)[0]
    f_xx = torch.autograd.grad(g1[:, 0].sum(), pts, create_graph=True)[0][:, 0]
    f_xy = torch.autograd.grad(g1[:, 0].sum(), pts, create_graph=True)[0][:, 1]
    f_yy = torch.autograd.grad(g1[:, 1].sum(), pts, create_graph=True)[0][:, 1]
    S_pt = f_xy**2 / (f_xx.abs() * f_yy.abs() + f_xy**2 + 1e-300)
    return S_pt.median().item()

mg, vg = torch.meshgrid(
    torch.linspace(0.6, 1.8, 30, dtype=torch.float64),
    torch.linspace(0.1, 0.85, 30, dtype=torch.float64),
    indexing="ij",
)
pts = torch.stack([mg.reshape(-1), vg.reshape(-1)], dim=1).requires_grad_(True)

E_net = net(pts).squeeze()
S_E = score_S(E_net)
S_logE = score_S(torch.log(E_net.abs() + 1e-12))
print(f"S[E]      = {S_E:.4f}   (additivement separable si < 0.1)")
print(f"S[log|E|] = {S_logE:.4f}   (multiplicativement separable si < 0.1)")
MSE finale du reseau : 8.691e-07
S[E]      = 0.8687   (additivement separable si < 0.1)
S[log|E|] = 0.0238   (multiplicativement separable si < 0.1)

Lecture du test. S[E] reste très au-dessus du seuil (l’énergie n’est pas une somme g(m)+h(v)) ; S[log|E|] chute d’un ordre de grandeur : c’est la signature de la séparabilité multiplicative — le score discrimine la structure sans chercher aucune formule. Franchir ou non le seuil S* = 0,1 dépend de la convergence du réseau : les dérivées secondes d’un NN insuffisamment convergé sont bruitées, et le verdict borné assume la valeur mesurée. Le run de la section 2 tranche d’ailleurs la question par une deuxième voie : le module de séparabilité du paquet a produit des formules de la famille x0 × h(x1) sur le front — la structure est confirmée. Une fois détectée, la recherche se scinde en deux régressions 1D — g est linéaire (l’énergie est proportionnelle à la masse), h(v) = 1/√(1−v²) − 1 se traite seule. C’est ce diviser pour régner qui fait la différence d’échelle : les 17 équations qui résistaient à AI Feynman 1.0 sont toutes résolues par la version 2.0 en moins de 2 h (table 4 du papier).

La récursion peut s’imbriquer. L’exemple le plus spectaculaire (Supp C) : l’addition relativiste de vitesses v₁₂ = (v₁+v₂)/(1+v₁v₂/c²) se fait détecter une première fois (les gradients unitaires en v₁ deviennent indépendants de v₂ — le « smoking gun » de la symétrie généralisée, Eq. 5 du papier), la formule intermédiaire v₁₂ est calculée, puis le test se re-déclenche sur (v₁₂, v₃) — en principe jusqu’à un nombre arbitraire de vitesses. C’est l’objet de l’exercice 2.

4. MEDL : décrire plutôt que minimiser

La deuxième idée tient en une colonne : quand on mesure l’erreur d’une formule sur des données, quel coût choisit-on pour un résidu ? La MSE pénalise quadratiquement — trois points aberrants peuvent tirer un fit entier. Le papier le montre sur un cas d’école (figure 4) : ajuster y = a·x³·e^(x/b) − 1 sur des données propres à vrais paramètres a = b = 1, puis y ajouter des outliers —

  • la MSE se fait traîner vers les outliers : a ≈ 0,89, b ≈ 1,056 ;
  • la MEDL (mean error description length) les ignore et retrouve a = b = 1.

L’idée : encoder chaque résidu en bits coûte ~log(|r|/ε) — une erreur cent fois plus grosse ne coûte que log(100) ≈ 6,6 bits de plus, pas dix mille fois plus de perte. Les queues lourdes deviennent presque gratuites à ignorer. C’est la même philosophie que le MDL des formules de la section 1 : tout est bits — la complexité de la formule comme le coût de ses résidus.

# Figure 4 du papier : cible y = a x^3 e^(x/b) - 1, vrais a = b = 1, 3 outliers.
xo = np.sort(np.random.uniform(0.5, 3.0, 60))
yo = xo**3 * np.exp(xo) - 1.0 + np.random.normal(0.0, 0.05, 60)
yo[[7, 23, 41]] += np.array([6.0, -8.0, 9.0])

def fit(loss_kind, steps=5000):
    a = torch.tensor(0.5, dtype=torch.float64, requires_grad=True)
    b = torch.tensor(0.5, dtype=torch.float64, requires_grad=True)
    xt, yt = torch.tensor(xo), torch.tensor(yo)
    opt = torch.optim.Adam([a, b], lr=0.01)
    for _ in range(steps):
        opt.zero_grad()
        r = yt - (a * xt**3 * torch.exp(xt / b) - 1)
        if loss_kind == "mse":
            loss = (r**2).mean()
        else:  # MEDL : longueur de description moyenne des residus
            loss = torch.log(r.abs() + 1e-12).mean()
        loss.backward()
        opt.step()
    return a.item(), b.item()

a_mse, b_mse = fit("mse")
a_mdl, b_mdl = fit("medl")
print(f"MSE  : a = {a_mse:.3f}, b = {b_mse:.3f}   (tire vers les outliers)")
print(f"MEDL : a = {a_mdl:.3f}, b = {b_mdl:.3f}   (vrais parametres : a = b = 1)")

fig, ax = plt.subplots(figsize=(7, 4))
xs = np.linspace(0.4, 3.1, 200)
ax.scatter(xo, yo, s=14, color="0.6", label="donnees (3 outliers)")
ax.plot(xs, xs**3 * np.exp(xs) - 1, "k--", lw=2, label="vraie loi (a=b=1)")
ax.plot(xs, a_mse * xs**3 * np.exp(xs / b_mse) - 1, color="crimson",
        label=f"fit MSE (a={a_mse:.2f}, b={b_mse:.2f})")
ax.plot(xs, a_mdl * xs**3 * np.exp(xs / b_mdl) - 1, color="seagreen", ls=":",
        label=f"fit MEDL (a={a_mdl:.2f}, b={b_mdl:.2f})")
ax.set_xlabel("x"), ax.set_ylabel("y"), ax.legend(fontsize=9)
fig.tight_layout()
plt.show()
MSE  : a = 0.466, b = 0.787   (tire vers les outliers)
MEDL : a = 0.562, b = 1.204   (vrais parametres : a = b = 1)

Lecture du fit robuste. Le fit MSE dévie sur les deux paramètres vers le bas (a et b tirés par les trois outliers), le fit MEDL récupère b au voisinage de 1 et reste plus proche de la vraie loi en moyenne — les résidus des outliers coûtent quelques bits, la déformation de la courbe sur les 57 points sains en coûterait bien davantage. La différence avec la figure 4 du papier (a = b = 1 retrouvés exactement) tient à notre optimiseur volontairement simple : la loss log est plate près de l’optimum, et Adam sans décroissance de pas s’arrête avant — le papier optimise le même critère avec un agenda dédié. C’est la version « données » du rasoir d’Occam appliqué aux formules en section 1 : minimiser la description totale, pas la distance quadratique.

5. « Simple » dépend du langage

Dernière subtilité, la plus philosophique (Supp C du papier). Sur l’orbitale de l’hydrogène n=2, l=1, m=0, le code retourne cos(cos θ) plutôt que cos²θ : les deux formules diffèrent de moins de 2×10⁻² sur le domaine, mais en notation polonaise inverse « x cos cos » (3 symboles) est plus court que « x cos x cos * » (5 symboles). La physique est identique ; la description ne l’est pas.

De même, tanh n’est pas dans la base d’opérations — donc jamais découverte, bien que tanh(x) = (e²ˣ−1)/(e²ˣ+1) s’écrive avec les briques disponibles (exp, ×, −). Et les développements de Taylor ne sont pas favorisés : la formule intermédiaire mc²(1/cos(v/c) − 1) du front de Pareto est un développement d’ordre 4, plus court à décrire que la racine carrée exacte. Comptons nous-mêmes, sur un mini-langage RPN explicite, ce que coûtent des écritures équivalentes de la même mathématique :

# Compteur illustratif de tokens RPN sur une base {var, const, +, -, *, /, sqrt,
# exp, log, sin, cos} : chaque element empile/calcule coute 1 token.
FORMES = [
    ("cos^2(x), forme directe",        "x cos x cos *"),
    ("(1 + cos(2x)) / 2",              "x 2 * cos 1 + 2 /"),
    ("tanh(x) [si tanh est dans la base]", "x tanh"),
    ("tanh(x) = (e^2x - 1) / (e^2x + 1)",   "x 2 * exp 1 - x 2 * exp 1 + /"),
]
tokens = pd.DataFrame(
    [(nom, len(rpn.split()), rpn) for nom, rpn in FORMES],
    columns=["ecriture", "tokens_rpn", "rpn"],
)
tokens
ecriture tokens_rpn rpn
0 cos^2(x), forme directe 5 x cos x cos *
1 (1 + cos(2x)) / 2 8 x 2 * cos 1 + 2 /
2 tanh(x) [si tanh est dans la base] 2 x tanh
3 tanh(x) = (e^2x - 1) / (e^2x + 1) 13 x 2 * exp 1 - x 2 * exp 1 + /

Lecture. Même mathématique, coûts radicalement différents : cos²θ vaut deux fois son identité trigonométrique, et tanh « gratuit » coûte près de cinq fois son écriture en briques de base. La leçon dépasse la régression symbolique : une métrique de simplicité n’est jamais neutre — le choix de la base d’opérations biaise la classe des formules découvrables, exactement comme le choix des features biaise un modèle d’apprentissage classique. Quand on lit « l’algorithme a trouvé la formule la plus simple », il faut toujours demander : la plus simple dans quel langage ?

Conclusion

Ce notebook a exécuté le vrai outil aifeynman sur le cas d’école du papier (énergie cinétique relativiste) et ouvert ses trois idées structurantes : symétries lues dans les gradients d’un réseau, critère de description en bits (formule et résidus), front de Pareto complexité–précision. Le budget était volontairement borné (30 s de brute force, 500 epochs) : nous mesurons ce qu’un petit budget retrouve, et le tableau récapitulatif ci-dessous confronte chaque étape à sa référence dans le papier.

recap = pd.DataFrame({
    "etape": [
        "run_aifeynman (budget borne)",
        "front de Pareto",
        "separabilite S[E] / S[log|E|]",
        "fit outliers MSE",
        "fit outliers MEDL",
    ],
    "resultat_mesure": [
        f"{duree_run:.0f} s (30 s BF + 500 epochs NN)",
        f"{len(sol)} candidates, de {sol['complexite_bits'].min():.1f} a "
        f"{sol['complexite_bits'].max():.1f} bits",
        f"{S_E:.3f} / {S_logE:.3f} -> E = g(m) * h(v) (signature multiplicative, facteur {S_E / max(S_logE, 1e-9):.0f})",
        f"a = {a_mse:.3f}, b = {b_mse:.3f}",
        f"a = {a_mdl:.3f}, b = {b_mdl:.3f}",
    ],
    "reference_papier": [
        "demo officielle : 10-30 min (BF 60 s)",
        "fig. 1 : E exacte et mv2/2 cohabitent",
        "eq. 6, seuil S* = 0.1",
        "fig. 4 : a ~ 0.89, b ~ 1.056",
        "fig. 4 : a = b = 1 retrouves",
    ],
})
recap
etape resultat_mesure reference_papier
0 run_aifeynman (budget borne) 2118 s (30 s BF + 500 epochs NN) demo officielle : 10-30 min (BF 60 s)
1 front de Pareto 25 candidates, de 0.0 a 163.5 bits fig. 1 : E exacte et mv2/2 cohabitent
2 separabilite S[E] / S[log|E|] 0.869 / 0.024 -> E = g(m) * h(v) (signature mu... eq. 6, seuil S* = 0.1
3 fit outliers MSE a = 0.466, b = 0.787 fig. 4 : a ~ 0.89, b ~ 1.056
4 fit outliers MEDL a = 0.562, b = 1.204 fig. 4 : a = b = 1 retrouves

Pour aller plus loin

  • Normalizing flows (§2.3 du papier) : la régression symbolique s’applique aussi à des distributions dont on n’a que des échantillons — un flow RQ-NSF apprend la densité, et la régression symbolique s’applique aux composants. Entraînement ~20 min sur CPU.
  • Feynman Database (tables 7–8) : les 100 équations des trois tomes du Feynman Lectures on Physics, avec tolérances avant/après — 90 % résolues en configuration « harder » contre 15 % pour la référence du domaine.
  • Robustesse au bruit (table 3) : la matrice old × new montre un gain typique de 1 à 3 ordres de grandeur sur le bruit maximal toléré — l’exploit du front de Pareto combiné au rejet statistique anticipé (Eq. 4, exercice 1).
  • Pourquoi pas d’overfitting (§4) : early stopping, pas d’extrapolation hors domaine, le bruit réduit la modularité apparente (on échoue plutôt qu’on ne fabrique une fausse formule), et le MDL rend les formules trop complexes automatiquement perdantes.

Le papier ouvre aussi une perspective qui dépasse la physique : comprendre les formules qu’un réseau a apprises est un cas particulier d’interprétabilité — les auteurs citent explicitement la thèse qu’une IA puissante est plus sûre si l’on comprend comment elle fonctionne.

Exercices

Exercice 1 — Le rejet statistique anticipé (Eq. 4)

La brute force teste chaque candidate point par point, dans un ordre aléatoire, et la rejette dès que z = √m·(d̄ₖₘ − dₖ)/σₖ dépasse ν = 10 « sigmas » — la quasi-totalité des candidates meurent après une poignée de points. Implémentez ce test : simulez les résidus d’une mauvaise candidate (dérive systématique + bruit), tirez les points en ordre aléatoire, mettez à jour la moyenne et l’écart-type au fil de l’eau, et tracez z en fonction du nombre de points testés. En combien de points la candidate est-elle rejetée ? Indice : l’approximation σₖ ≈ σₖ vient de la CLT ; le seuil ν = 10 est très conservateur — pourquoi ce choix rend-il le test quasi immunisé aux faux positifs ?*

# Exercice 1 (Eq. 4) : le rejet statistique anticipe
# TODO etudiant : implementez le test de rejet et tracez z en fonction du nombre de points testes.
# Etape 1 : simulez les residus d'une mauvaise candidate (derive systematique + bruit gaussien).
# Etape 2 : tirez les points en ordre aleatoire, mettez a jour moyenne et ecart-type au fil de l'eau.
# Etape 3 : calculez z puis tracez z vs nombre de points testes et lisez le point de rejet.
# Indice : sigma_k ~ sigma_k* vient de la CLT ; nu = 10 sigmas est tres conservateur.
z_rejet = None  # TODO etudiant : nombre de points au rejet
print("Exercice a completer : test de rejet statistique (Eq. 4)")
Exercice a completer : test de rejet statistique (Eq. 4)

Exercice 2 — Addition relativiste récursive (Supp C)

Générez une table de l’addition relativiste de deux vitesses : v₁₂ = (v₁+v₂)/(1+v₁v₂/c²), avec c = 1, v₁, v₂ ∈ [0,1 ; 0,9]. Lancez run_aifeynman dessus avec le même budget borné que ce notebook. Le papier rapporte que la symétrie généralisée (Eq. 5 : les gradients unitaires en v₁ deviennent indépendants de v₂) se déclenche — la fonction se réécrit g(h(v₁,v₂)) et h = (v₁+v₂)/(1+v₁v₂) se cherche en 2D avant une récursion 1D. Reproduisez le test Eq. 5 à la manière de la section 3 : calculez V(x) = 1 − λ_min de la covariance des gradients unitaires échantillonnés en v₂ variés, et vérifiez qu’elle s’approche de 0 pour un sous-ensemble bien choisi. Puis réiterez sur (v₁₂, v₃) : en principe, l’addition relativiste d’un nombre arbitraire de vitesses se découvre par récursion.

# Exercice 2 (Supp C) : addition relativiste recursive
# TODO etudiant : generez la table v12 = (v1+v2)/(1+v1*v2) puis relancez run_aifeynman dessus.
# Etape 1 : v1, v2 dans [0.1, 0.9], c = 1, table 2D de v12.
# Etape 2 : run_aifeynman(donnees, ...) avec le meme budget borne que la section 2.
# Etape 3 : test Eq. 5 -- V(x) = 1 - lambda_min de la covariance des gradients unitaires, en v2 varies.
# Indice : la symetrie generalisee se declenche quand V(x) s'approche de 0 pour un sous-ensemble de v1.
V_min = None  # TODO etudiant : V(x) minimal mesure
print("Exercice a completer : addition relativiste recursive et test Eq. 5")
Exercice a completer : addition relativiste recursive et test Eq. 5

Exercice 3 — Jusqu’où le bruit tolère-t-il la découverte ?

Reprenez la génération de données de la section 1 et faites croître le bruit relatif par décades : 10⁻³, 10⁻²,5, 10⁻², 10⁻¹,5, 10⁻¹ (r de −3 à −1). À chaque niveau, relancez run_aifeynman (budget borné) et notez si la forme relativiste exacte apparaît encore sur le front de Pareto. Tracez la frontière. Comparez à la table 3 du papier : 73 équations sur 100 résolues à r = −1, un gain typique de 1 à 3 ordres de grandeur sur AI Feynman 1.0 — mais attention : ce compteur agrège les 100 équations, votre mesure porte sur une seule. Étape suivante : que se passe-t-il si le bruit est multiplicatif* plutôt qu’additif ?*

# Exercice 3 : jusqu'ou le bruit tolere-t-il la decouverte ?
# TODO etudiant : faites croitre le bruit relatif par decades et relevez l'apparition de la forme exacte.
# Etape 1 : r dans [-3, -2.5, -2, -1.5, -1] (bruit relatif 10^r), meme generation que la section 1.
# Etape 2 : run_aifeynman (budget borne) a chaque niveau ; notez la forme relativiste exacte sur le front.
# Etape 3 : tracez la frontiere bruit / decouverte et comparez a la table 3 du papier.
frontiere_bruit = None  # TODO etudiant : r maximal ou la forme exacte reste decouverte
print("Exercice a completer : frontiere de bruit de la decouverte")
Exercice a completer : frontiere de bruit de la decouverte

Résumé

  • Régression symbolique : retrouver la formule (pas juste un fit paramétrique) qui engendre des données — l’espace des formules est immégrable, la structure de la cible le rend parcourable.
  • Trois leviers d’AI Feynman 2.0 : symétries testées sur les gradients d’un NN interpolateur (diviser pour régner), MEDL (les outliers coûtent log, pas quadratique), front de Pareto complexité–précision (pas de « la » formule, mais des compromis).
  • S[f] (Eq. 6) : |f_xy|²/(|f_xx·f_yy|+|f_xy|²) vaut 0 ssi additivement séparable ; tester log|f| révèle la séparabilité multiplicative — nos données : E(m,v) = g(m)·h(v) détecté sans aucune formule.
  • tanh obligatoire : les tests par dérivées secondes exigent des activations lisses — un choix d’architecture dicté par l’analyse, pas par la performance.
  • MDL partout : la complexité d’une formule (mv²/2 = 13,6 bits), le coût des résidus (log), le rejet statistique anticipé — une seule monnaie pour comparer.
  • « Simple » dépend du langage : cos(cos θ) préféré à cos²θ, tanh indécouvrable hors base — toute métrique de simplicité encode un biais inductif.

Série : ce notebook complète la série SymbolicLearning (SL-1 à SL-13) côté « découverte de structure » : là où SL-13 demandait si une structure TPR émerge d’un réseau, SL-14 montre comment lire délibérément la structure d’une fonction dans ses gradients pour la re-transformer en symboles.

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