Dequan–Li (Li 2008 three-scroll) — dx/dt = a(y−x)+d·x·z, dy/dt = k·x+f·y−x·z, dz/dt = c·z+x·y−e·x². Classic a=40 c=1.833 d=0.16 e=0.65 f=20 k=55 (d,e,f,k fixed). Dual a+c sliders. Smooth quadratic three-scroll fold, bulk centroid ≈ (−1.72, −1.39, 104.82) from warm 20k + 80k RK4 @ dt=0.0002. Distinct from Coullet (jerk cubic, c=−0.45), Burke–Shaw, Sprott–Linz A–S, Lorenz-84, Finance, Bouali, Genesio–Tesi, Arnéodo, 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 coullet.html, not burke-shaw.html, not arneodo.html, not sprott-linz-*.html, not sprott.html. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.