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: no strongly notable standard properties. The atlas additionally detects Multifractal Spectrum:hurst_estimate. It sits beside Duffing Oscillator in the atlas (standard-bank rank 59) — a neighbor conventional features miss.
Visibility Graph:assortativity | +2.1z | bank-miss 1.7σ |









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| Nearest neighbor | Distance | |
|---|---|---|
| Spring Pendulum | 2.79 | |
| Duffing Oscillator | 2.88 | |
| Rossler Attractor | 2.94 |
Hodge–Laplacian › Hodge–Laplacian:solenoidal_fraction | rank 5/307 | 0.9962 |
Navier-Stokes › Navier-Stokes:sl_fit_quality | rank 303/307 | -0.9944 |