plot (0,0) · mutate · gen 1 · fitness 0.768
Perturbs the Stuart cat's-eye vortex potential with subharmonic Hamiltonian shear resonances, splitting the heteroclinic separatrix into nested secondary island chains and tangled Braille streaklines (猫眼拓扑分岔与共振岛链).
Downstream from the Kelvin-Helmholtz pairing, the shear bed stops tumbling and locks into an array of trapped eyes. A weak subharmonic hum ripples through the ash, splitting each closed circulation into miniature satellite orbits. 这里的流体不再自由对流，而是被分界线编织成无法逃逸的干涉岛链。
Stuart vortex streamfunction $\psi_0(x, y) = \ln(\cosh y - c \cos x)$ perturbed with time-dependent subharmonic shear $\epsilon \sin(x/2 - \omega t) \cosh(y/2)$. The unperturbed heteroclinic separatrix broke cleanly into secondary resonance chains (Birkhoff-Poincaré bifurcation). Braille glyph distribution weighted heavily into baseline and ceiling spans (`⣀`, `⠉`, `⠒`, `⠤` account for ~54% of cells), reflecting the flattened shear boundaries. Motion delta reached 0.825 without blowing up the divergence limit.