lorenzod.deq

defequ

unknown[0]:="x";
unknown[1]:="y";
unknown[2]:="z";

x'(t):={ 10.0*(y-x) };
y'(t):={ 28.0*x-y-x*z };
z'(t):={ -2.667*z+x*y };

x_:=-15.0;
y_:=-15.0;
z_:= 28.0;

  t0:=0.0;
maxt:=30;
  dt:=0.01;