1D observable from dense quasiperiodic orbit on T^4 (frequencies sqrt 2,3,5,7). Ground-truth intrinsic dimension d=4 --- past typical GP correlation-dim horizon.
Standard analysis sees: red spectrum (low-frequency / 1-over-f power); strongly periodic; stationary. The atlas finds no named structure, but the source is distinctively extreme on Bispectrum:off_diagonal_ratio (+4.1z) — beyond what the standard bank predicts for it.
Bispectrum:off_diagonal_ratio | +4.1z | bank-miss 1.8σ |
Isochronicity:frequency_shear | +2.4z | bank-miss 1.5σ |









_(centered)/signed_log_z/4-Torus_Quasiperiodic.png)
_(centered)/xy_path/4-Torus_Quasiperiodic.png)

/barcode/4-Torus_Quasiperiodic.png)
/d_curve/4-Torus_Quasiperiodic.png)








/phi_spectrum/4-Torus_Quasiperiodic.png)










/default/4-Torus_Quasiperiodic.png)
/default/4-Torus_Quasiperiodic.png)


| Nearest neighbor | Distance | |
|---|---|---|
| 5-Torus Quasiperiodic | 1.25 | |
| 3-Torus Quasiperiodic | 1.50 | |
| Ruelle-Takens Cascade | 2.50 | cross-origin |
Bispectrum › Bispectrum:off_diagonal_ratio | rank 3/306 | 0.9348 |
Chladni › Chladni:modal_nodal_cascade | rank 302/306 | -0.4262 |
Fractal (Mandelbrot) › Fractal (Mandelbrot):escape_time_variance | rank 5/306 | 910.0793 |
Isochronicity › Isochronicity:frequency_shear | rank 4/306 | 0.8560 |
Ordinal Partition › Ordinal Partition:time_irreversibility | rank 302/306 | 0.0099 |
Septagonal (Danzer) › Septagonal (Danzer):z_conjugate | rank 1/306 | 0.7828 |
Septagonal (Danzer) › Septagonal (Danzer):cubic_coherence | rank 4/306 | 0.2262 |
Symplectic › Symplectic:phase_volume_explored | rank 5/306 | 0.8112 |