Coullet — dx/dt = y, dy/dt = z, dz/dt = a·x + b·y + c·z − x³ (c=−0.45 fixed). Classic chaotic a=0.80 b=−1.50. Cubic fold on a jerk chain (distinct gallery params from Arnéodo–Coullet–Tresser α=5.5 β=3.5 μ=−1), bulk centroid ≈ (0.68, 0.00, 0.00) from warm 12k + 80k RK4 @ dt=0.002. Distinct from Dequan–Li, Arnéodo, Burke–Shaw, Sprott–Linz A–S, Lorenz-84, Finance, Bouali, Genesio–Tesi, Newton–Leipnik, Rabinovich–Fabrikant, Nosé–Hoover, Rucklidge, Wang–Sun, Lü, Chen, four-wing Qi, Dadras, Halvorsen, Chua, Aizawa, Thomas, Rössler, Lorenz butterfly, Newton basins. RK4, not dequan-li.html, not arneodo.html, not burke-shaw.html, not sprott-linz-s.html, not sprott-linz-r.html, not sprott-linz-q.html, not sprott-linz-p.html, not sprott-linz-o.html, not sprott-linz-n.html, not sprott-linz-m.html, not sprott-linz-l.html, not sprott-linz-k.html, not sprott-linz-j.html, not sprott-linz-i.html, not sprott-linz-h.html, not sprott-linz-g.html, not sprott-linz-f.html, not sprott-linz-e.html, not sprott-linz-d.html, not sprott-linz-c.html, not sprott-linz-b.html, not sprott-linz-a.html, not sprott.html, not Lorenz-84, not Finance, not Bouali, not Genesio–Tesi, not Arnéodo, 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.