1D observable from dense quasiperiodic orbit on T^2 (frequencies sqrt 2, sqrt 3). Ground-truth intrinsic dimension d=2. Ergodic but not mixing.
Standard analysis sees: rich, high-entropy values; red spectrum (low-frequency / 1-over-f power); strongly periodic; stationary. The atlas finds no named structure, but the source is distinctively extreme on Isochronicity:frequency_shear (+2.9z) — beyond what the standard bank predicts for it.
Isochronicity:frequency_shear | +2.9z | bank-miss 1.8σ |
Bispectrum:bicoherence_gini | -2.3z | bank-miss 2.3σ |









_(centered)/signed_log_z/2-Torus_Quasiperiodic.png)
_(centered)/xy_path/2-Torus_Quasiperiodic.png)

/barcode/2-Torus_Quasiperiodic.png)
/d_curve/2-Torus_Quasiperiodic.png)








/phi_spectrum/2-Torus_Quasiperiodic.png)










/default/2-Torus_Quasiperiodic.png)
/default/2-Torus_Quasiperiodic.png)


| Nearest neighbor | Distance | |
|---|---|---|
| 3-Torus Quasiperiodic | 2.78 | |
| 4-Torus Quasiperiodic | 3.00 | |
| 5-Torus Quasiperiodic | 3.34 |
Chladni › Chladni:modal_nodal_cascade | rank 304/306 | -0.4916 |
Higher-Order Statistics › Higher-Order Statistics:c3_energy | rank 302/306 | 0.0004 |
Isochronicity › Isochronicity:frequency_shear | rank 1/306 | 0.9604 |
Moiré › Moiré:moire_invariance_breadth | rank 306/306 | 0.0027 |
Navier-Stokes › Navier-Stokes:sl_fit_quality | rank 305/306 | -0.9986 |
Septagonal (Danzer) › Septagonal (Danzer):cubic_coherence | rank 1/306 | 0.3095 |
Septagonal (Danzer) › Septagonal (Danzer):z_conjugate | rank 2/306 | 0.7764 |
Spirograph › Spirograph:petal_symmetry | rank 2/306 | 0.6793 |