Rudin-Shapiro

symbolic-dynamics · 37 views
symbolic-dynamicssymbolic

What It Is

Partial sums of the Rudin-Shapiro ±1 sequence --- a deterministic random walk (the flat-spectrum property belongs to the ±1 increments; the emitted partial-sum walk is red, ~1/f²)

Interpretation

Standard analysis sees: smooth / autocorrelated; long-range memory (persistent); strongly periodic; volatility-clustering (bursty); monofractal. The atlas additionally detects Nonstationarity:adf_pvalue.

What standard analysis sees
tail heaviness0.33
asymmetry0.19
occupancy0.52
short-range corr0.89
long-range memory0.89
spectral colour0.24
periodicity0.91
complexity0.34
time-irreversibility0.61
volatility clustering0.86
multifractality0.15
dimensionality0.21
nonstationarity0.77
What the atlas adds
Nonstationarity:adf_pvalue+2.4z
unit-root nonstationarity (ADF cannot reject random-walk null)
Atlas-extreme metrics the standard bank can’t predict for this source
Dodecagonal (Stampfli):pisot_triplet_coherence+3.8zbank-miss 1.4σ
H3 Icosahedral:nn_enrichment+3.0zbank-miss 3.7σ
Wasserstein:self_similarity-3.0zbank-miss 1.9σ
Moiré:moire_peak_alpha+2.8zbank-miss 1.5σ
Hölder Regularity:holder_min+2.5zbank-miss 2.3σ
Laplacian:gradient_curvature_anticorrelation+2.4zbank-miss 3.0σ

Composition

dtypefloat64
range[-199, 56]
unique values256 / 16384
mean ± std-61.5 ± 59.9

Render Gallery

Atlas Position

Nearest neighborDistance
Mertens Function3.14cross-origin
Brownian Walk3.62cross-origin
Hilbert Walk3.73

Open in Atlas →

Which Geometries Light Up

Catch24Catch24:PD_PeriodicityWang_th0_01rank 2/3073529.8000
Catch24Catch24:CO_FirstMin_acrank 3/3076455.5333
Catch24Catch24:CO_f1ecacrank 5/3072305.0053
Catch24Catch24:CO_Embed2_Dist_tau_d_expfit_meandiffrank 305/3070.0000
ChladniChladni:domain_ks_exponentialrank 3/3070.7272
D4 TrialityD4 Triality:edge_ortho_polarityrank 1/3070.7570
Dodecagonal (Stampfli)Dodecagonal (Stampfli):pisot_triplet_coherencerank 3/3070.5402
Hölder RegularityHölder Regularity:holder_minrank 1/3071.0000
Inflation (Substitution)Inflation (Substitution):discrepancyrank 5/30723.0286
LaplacianLaplacian:gradient_curvature_anticorrelationrank 1/3071.0000
MoiréMoiré:moire_dilation_entropyrank 5/3074.1467
Navier-StokesNavier-Stokes:ess_rescaling_gainrank 306/307-0.0012
SymplecticSymplectic:phase_reflection_symmetryrank 3/3070.9983
in continuous-flows
alphabetical
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