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 detects no named structure beyond this. It sits beside Duffing Oscillator in the atlas (standard-bank rank 29) — a neighbor conventional features miss.
Nothing beyond the standard reading — this source’s structure is already captured by standard features; the atlas adds no named residual.








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| Nearest neighbor | Distance | |
|---|---|---|
| Spring Pendulum | 2.68 | cross-domain |
| Magnetic Pendulum (3-Magnet) | 2.73 | cross-domain |
| Duffing Oscillator | 2.85 |
Hodge–Laplacian › Hodge–Laplacian:solenoidal_fraction | rank 5/298 | 0.9965 |