Tribonacci Word

exotic · 36 views
exotic

What It Is

Cubic-Pisot Sturmian-like: substitution a→ab, b→ac, c→a. Substitution matrix [[1,1,0],[1,0,1],[1,0,0]] has eigenvalue Tribonacci constant ≈1.839 (real root of x³=x²+x+1). Ternary alphabet, cubic algebraic ratio --- a degree-3 Pisot contrast class against degree-2 Fibonacci/Pell.

Interpretation

Standard analysis sees: few distinct values; anti-correlated (alternating); anti-persistent; blue spectrum (high-frequency power); strongly periodic; homoskedastic; monofractal; stationary. The atlas finds no named structure, but the source is distinctively extreme on Julia Set:potential_variance (+4.8z) — beyond what the standard bank predicts for it.

What standard analysis sees
tail heaviness0.43
asymmetry0.80
occupancy0.08
short-range corr0.03
long-range memory0.05
spectral colour0.98
periodicity0.86
complexity0.28
time-irreversibility0.49
volatility clustering0.11
multifractality0.05
dimensionality0.51
nonstationarity0.10
What the atlas adds
Atlas-extreme metrics the standard bank can’t predict for this source
Julia Set:potential_variance+4.8zbank-miss 2.1σ
Julia Set:potential_smoothness+4.6zbank-miss 2.0σ
Modular Residue:cycle_fraction+3.1zbank-miss 1.7σ

Composition

dtypeuint8
range[0, 255]
unique values3 / 16384
mean ± std78.8 ± 95.3

Fixed alphabet — only 3 distinct symbols across 16384 samples.

Render Gallery

Atlas Position

Nearest neighborDistance
Pell Word4.24
Penrose Substitution4.50
Padovan Word4.75

Open in Atlas →

Which Geometries Light Up

Catch24Catch24:SC_FluctAnal_2_dfa_50_1_2_logi_prop_r1rank 298/2980.1200
Multi-Scale WassersteinMulti-Scale Wasserstein:w_max_ratiorank 3/2981526.7181
Sol (Thurston)Sol (Thurston):sol_step_persistencerank 295/298-0.1236
Time ReversibilityTime Reversibility:increment_skewness_maxrank 295/2980.0006
in waveform
alphabetical
← / → within domain · ⇧← / ⇧→ alphabetical · ⇧← / ⇧→ inside an open render = same view across sources