Sprott–Linz Case D — dx/dt = −y, dy/dt = x + z, dz/dt = x·z + a·y². Classic chaotic a=3. Distinct from Case C (ż=α−x²), Case B (ż=α−x·y), Case A (y, −x+y·z, a−y²), and Lorenz-84. RK4, 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.