File: nf3.ode

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# simple normal form for triple zero eigenvalue
# equivalent to the Rossler attractor
# this file illustrates how to compute a bifurcation diagram
# as c varies in -silent mode
# xppaut -silent nf3.ode  
# plot, eg col 3 vs col 5
x'=y
y'=z
z'=-a*z-b*y-c*x-x^2
c'=0
init x=.5,c=2.2
@ total=1200,meth=euler,trans=1000
@ poimap=section,poivar=x,poisgn=1,poipln=0
@ range=1,rangeover=c,rangestep=200,rangelow=2.88
@ rangehigh=2.96,rangereset=no,rangeoldic=yes
par a=1,b=2
d