Chirikov standard map at K=0.9716 --- mixed phase space with coexisting regular islands and chaotic sea, the paradigm of Hamiltonian chaos
Standard analysis sees: bounded / light-tailed; anti-persistent; time-irreversible (slow rise, sharp collapse). The atlas finds no named structure, but the source is distinctively extreme on Laplacian:laplacian_evolutionary_index (-2.3z) — beyond what the standard bank predicts for it. It sits beside Critical Circle Map (Bronze Mean) in the atlas (standard-bank rank 65) — a neighbor conventional features miss.
Laplacian:laplacian_evolutionary_index | -2.3z | bank-miss 1.5σ |








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| Nearest neighbor | Distance | |
|---|---|---|
| Standard Map K=0.5 (Mixed) | 3.25 | |
| Uniform Chaos (Logistic Scramble) | 4.18 | |
| Fibonacci Quasicrystal | 4.58 | cross-domain |
This source does not rank extreme on any metric.