Riemann-Hardy-Littlewood

number-theory · 37 views
number-theoryarithmetic

What It Is

Riemann's 1859 'monster' R(t) = sum_{n>=1} sin(pi n^2 t)/(pi n^2). Continuous everywhere, differentiable only at rationals (2p+1)/(2q+1) where R' = -1/2 (Gerver 1970), nowhere else (Hardy 1916). Quadratic frequencies n^2 with 1/n^2 amplitude decay --- the steepest known cosine fractal: ~92% of energy in the fundamental, non-differentiability emerging from the long thin Hausdorff-dimensional tail.

Interpretation

Standard analysis sees: smooth / autocorrelated; long-range memory (persistent); strongly periodic; volatility-clustering (bursty); low-dimensional; nonstationary / drifting. The atlas additionally detects Multi-Scale Wasserstein:w_max_ratio, Nonstationarity:adf_pvalue, Multifractal Spectrum:hurst_estimate.

What standard analysis sees
tail heaviness0.17
asymmetry0.40
occupancy0.82
short-range corr0.99
long-range memory0.99
spectral colour0.30
periodicity0.99
complexity0.47
time-irreversibility0.85
volatility clustering0.97
multifractality0.57
dimensionality0.11
nonstationarity0.90
What the atlas adds
Multi-Scale Wasserstein:w_max_ratio+8.1z
scale-coherent dispersion mismatch (max/min Wasserstein across scales)
Nonstationarity:adf_pvalue+3.8z
unit-root nonstationarity (ADF cannot reject random-walk null)
Multifractal Spectrum:hurst_estimate+2.0z
self-affinity H = τ(2)/2 (alternate to Hölder hurst)
Atlas-extreme metrics the standard bank can’t predict for this source
Septagonal (Danzer):z_primary+3.2zbank-miss 1.1σ

Composition

dtypefloat64
range[-0.4, 0.4]
unique values16384 / 16384
mean ± std-1.81e-05 ± 0.234

Render Gallery

Atlas Position

Nearest neighborDistance
fBm (Persistent)3.64cross-origin
Perlin Noise4.00cross-origin
Geometric Brownian Motion4.03cross-origin

Open in Atlas →

Which Geometries Light Up

Ammann-Beenker (Octagonal)Ammann-Beenker (Octagonal):convergent_profilerank 305/307-0.1570
Catch24Catch24:CO_HistogramAMI_even_2_5rank 1/3071.5593
Catch24Catch24:SC_FluctAnal_2_dfa_50_1_2_logi_prop_r1rank 1/3070.8720
Catch24Catch24:SP_Summaries_welch_rect_area_5_1rank 3/3070.9999
Catch24Catch24:FC_LocalSimple_mean3_stderrrank 305/3070.0089
ChladniChladni:plate_low_mode_fractionrank 3/3070.9955
H² × ℝ (Thurston)H² × ℝ (Thurston):radial_temporal_memoryrank 4/3074.9648
Multi-Scale WassersteinMulti-Scale Wasserstein:w_max_ratiorank 2/3072884.9213
Navier-StokesNavier-Stokes:sl_fit_qualityrank 1/3070.9579
Navier-StokesNavier-Stokes:ess_rescaling_gainrank 303/3070.0001
PredictabilityPredictability:excess_predictabilityrank 2/3072.9204
SL(2,ℝ) (Thurston)SL(2,ℝ) (Thurston):trace_autocorrelationrank 4/3070.9992
Septagonal (Danzer)Septagonal (Danzer):cubic_coherencerank 3/3070.2564
Septagonal (Danzer)Septagonal (Danzer):z_primaryrank 3/3070.3143
Spectral AnalysisSpectral Analysis:spectral_bandwidthrank 304/3070.0009
Spherical S²Spherical S²:hemisphere_balancerank 3/3070.9999
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