Sprott simplest chaotic jerk (Sprott 1997) — dx/dt = y, dy/dt = z, dz/dt = −a·z + g·y² − x. Classic chaotic a=0.6 g=1. Dual a+g sliders. Distinct from Sprott–Linz A–S (sprott-linz-*.html), San-Qi (san-qi.html), Yu–Wang, Liu, Lü, Chen–Ueta, Chen–Lee, Rikitake, Moore–Spiegel, Rayleigh–Bénard, Hadley, Dequan–Li, Coullet, Burke–Shaw, Finance, Bouali, Genesio–Tesi, Arnéodo, Newton–Leipnik, Rucklidge, Wang–Sun, four-wing Qi, Dadras, Halvorsen, Chua, Aizawa, Thomas, Rössler. Bulk centroid ≈ (0.54, 0.95, 1.64) from warm 50k + 200k RK4 @ dt=0.001. RK4 jerk cascade. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.