# a generic nonlinear 2D system with 4 parameters
par a,b,c,d
f(x,y)=x+exp(-y)
g(x,y)=-y
x'=f(x,y)
y'=g(x,y)
@ xp=x,yp=y,xlo=-8,ylo=-8,xhi=8,yhi=8,bound=10000,nmesh=55
done