Moebius mu(n) in {-1, 0, +1} --- 0 on non-squarefree n (~39.2% by density), (-1)^omega(n) on squarefree n. Generator of multiplicative number theory via the identity sum_{d|n} mu(d) = [n=1]; stationary ternary sequence whose partial sum is Mertens.
Standard analysis sees: bounded / light-tailed; few distinct values; aperiodic / broadband; homoskedastic; monofractal; high-dimensional / space-filling; stationary. The atlas finds no named structure, but the source is distinctively extreme on SL(2,ℝ) (Thurston):parabolic_fraction (+3.4z) — beyond what the standard bank predicts for it.
SL(2,ℝ) (Thurston):parabolic_fraction | +3.4z | bank-miss 2.7σ |
Boltzmann:dominant_lag | +3.3z | bank-miss 1.6σ |
Zariski:algebraic_residual | +3.1z | bank-miss 3.5σ |
Fixed alphabet — only 3 distinct symbols across 16384 samples.









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| Nearest neighbor | Distance | |
|---|---|---|
| Phi-Squared β-Shift | 3.77 | cross-origin |
| Free Group F₂ Walk | 4.25 | cross-origin |
| Codon Usage | 4.31 | cross-origin |
Cayley › Cayley:delta_hyp_norm | rank 2/307 | 0.2628 |
Mostow Rigidity › Mostow Rigidity:laplacian_perturbation_stability | rank 1/307 | 1.0000 |
Mostow Rigidity › Mostow Rigidity:volume_sum_jitter_stability | rank 1/307 | 0.9741 |
Zariski › Zariski:algebraic_residual | rank 2/307 | 0.0716 |
Zariski › Zariski:residual_slope | rank 306/307 | -5.7252 |