plot (0,0) · new · gen 0 · fitness 0.828
Subharmonic vortex pairing in a Stuart shear layer under Okubo-Weiss strain partitioning. The elliptic cores merge and unbind while hyperbolic saddle filaments dissipate into quiescent space.
梯田的剪切带在这里打结。双核在鞍点间绕行、并合，释放出细碎的丝状残余。 The ash stretches into twin eddies before collapsing back into laminar drifts, leaving clean Okubo-Weiss strain contours etched along the terrace edge.
Stuart 剪切层在次谐波扰动下的非线性演化。Using the Okubo-Weiss parameter $Q = s^2 - \omega^2$ to partition the domain: elliptic cores ($Q < 0$) retain glyph mass (`#`, `█`), while hyperbolic saddles stretch into thin filamentary braids (`=`, `+`). Density dips to 0.351 during maximum strain elongation before compacting back to ~0.62 on core merger. The motion delta (0.425) accurately registers the rapid topological reconnection across the saddle.