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xppaut 8.0%2Bdfsg-1
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par beta=1.463,gam=3.358,Input=1.352,eps=0.1,sigma=0
init V=2,X=1.5
@ parmin=0,parmax=6, ds=-0.001, dsmax=.01

xm(z) = z
Vnull(z) = 3*z-z^3+2+Input
Xnull(z) = gam*(1+tanh(z/beta))
wiener z

dV/dt = 3*V-V^3+2-X+Input+sigma*z
dX/dt = eps*(gam*(1+tanh(V/beta))-X)

@ BUT=AUTO:fa,NOUT=10
@ MAXSTOR=100000,TOTAL=400,XP=V,YP=X,Xlo=-3,Xhi=3,Ylo=-3,Yhi=6
@ METH=euler
@ AUTOVAR=V