# the henon map
x'=1-a*x^2+y
y'=j*x
par a=1.4,j=.3
init x=.316,y=.206
@ xp=x,yp=y,xlo=-1.3,xhi=1.3,ylo=-.4,yhi=.4
@ total=20000,meth=discrete,lt=0,maxstor=40000
done