Genesio–Tesi — dx/dt = y, dy/dt = z, dz/dt = −c·x − b·y − a·z + x². Classic chaotic a=0.44 b=1.1 c=1.0. RK4, not Arnéodo–Coullet–Tresser (−αx−βy−z+μx³), not Sprott–Linz A, not sprott.html, not Newton–Leipnik, not Rabinovich–Fabrikant, not Nosé–Hoover, not Rucklidge, not Wang–Sun, not Lü, not Chen, not four-wing Qi, not Dadras, not Halvorsen, not Chua, not Aizawa, not Thomas, not Rössler, not Lorenz butterfly, not Newton basins. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.