3-segment Lagrangian pendulum chain, equal m=L=1 --- Hamiltonian 3-DOF conservative chaos with sin-coupling. Direct extension of Double Pendulum by one link; meant to populate the multi-DOF pendulum family the way Lorenz-96 {N=4,8,36} populates the dissipative-chain family. RK4 with dt=0.002. Output: angular velocity of bottom segment.
Standard analysis sees: smooth / autocorrelated; long-range memory (persistent); red spectrum (low-frequency / 1-over-f power); low-complexity (predictable, not noise-like); time-irreversible (slow rise, sharp collapse); volatility-clustering (bursty); multifractal. The atlas finds no named structure, but the source is distinctively extreme on Moiré:moire_invariance_breadth (+2.7z) — beyond what the standard bank predicts for it.
Moiré:moire_invariance_breadth | +2.7z | bank-miss 1.3σ |









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| Nearest neighbor | Distance | |
|---|---|---|
| FPUT N=16 | 2.72 | cross-origin |
| Double Pendulum | 3.07 | |
| Lorenz-96 N=8 | 3.08 |
Moiré › Moiré:moire_invariance_breadth | rank 5/306 | 0.0353 |
Navier-Stokes › Navier-Stokes:sl_fit_quality | rank 2/306 | 0.9433 |
Wasserstein › Wasserstein:recurrence_distance | rank 4/306 | 0.0919 |