'  XVIIIChaos  -- Demonstration of the Lorenz Differential Equations Properties.

F{t,x,y,z}  =10  (y - x)
G{t,x,y,z} = 28 x - y - x*z
H{t,x,y,z} = -8/3 z + x *y

to = -25 : tf = 25 : xo = -0.5: yo = .01: zo = 0.1

IVP[F, G, H, {to, tf, xo, yo, zo} {1, .02, 2}]      ' <-- mode = 2
