Hamiltonian chaos in a 2D potential: V = ½(x²+y²) + x²y - y³/3. Conservative (no attractor), energy-surface confinement. At E=1/8 mixed regular/chaotic phase space
Standard analysis sees: rich, high-entropy values; smooth / autocorrelated; low-complexity (predictable, not noise-like); volatility-clustering (bursty); multifractal. The atlas finds no named structure, but the source is distinctively extreme on Visibility Graph:assortativity (+2.1z) — beyond what the standard bank predicts for it.
Visibility Graph:assortativity | +2.1z | bank-miss 1.1σ |









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| Nearest neighbor | Distance | |
|---|---|---|
| Spring Pendulum | 2.79 | |
| Duffing Oscillator | 2.89 | |
| Rossler Attractor | 2.94 |
Hodge–Laplacian › Hodge–Laplacian:solenoidal_fraction | rank 5/306 | 0.9962 |
Navier-Stokes › Navier-Stokes:sl_fit_quality | rank 302/306 | -0.9944 |