Oversampled period-2 oscillation --- a sinusoid whose alternate base cycles carry different amplitude, the canonical orbit just past a period-doubling bifurcation. Carries a subharmonic at f/2 (full period = two base cycles). The oversampled continuous analog of the critically-sampled period-2/4 maps, which the atlas otherwise lacks.
Standard analysis sees: no strongly notable standard properties. The atlas additionally detects Multifractal Spectrum:hurst_estimate. It sits beside Sine Wave in the atlas (standard-bank rank 85) — a neighbor conventional features miss.
Bispectrum:off_diagonal_ratio | +3.6z | bank-miss 2.1σ |









_(centered)/signed_log_z/Period-Doubled_Wave.png)
_(centered)/xy_path/Period-Doubled_Wave.png)

/barcode/Period-Doubled_Wave.png)
/d_curve/Period-Doubled_Wave.png)








/phi_spectrum/Period-Doubled_Wave.png)










/default/Period-Doubled_Wave.png)
/default/Period-Doubled_Wave.png)


| Nearest neighbor | Distance | |
|---|---|---|
| Sine Wave | 2.74 | |
| Duffing Oscillator | 2.97 | cross-origin |
| Hénon-Heiles | 3.19 | cross-origin |
Bispectrum › Bispectrum:off_diagonal_ratio | rank 4/307 | 0.8841 |
Hodge–Laplacian › Hodge–Laplacian:solenoidal_fraction | rank 2/307 | 0.9970 |
Hodge–Laplacian › Hodge–Laplacian:curl_div_ratio | rank 4/307 | 5.8377 |
p-Variation › p-Variation:variation_index | rank 303/307 | 1.0008 |