Charles Greathouse on Sat, 29 Oct 2016 06:23:03 +0200

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Finding fixed points in gp

Is there a good way to find fixed points in gp?

I found some code (simplified version below) which finds them by direct iteration, but I have to wonder if there's a more elegant way, either in general or in this particular case:

Eps_= 4.0*10.0^(-default(realprecision));
z=1+I; zlast=0;
for(k=1, 1e6, z=li(z); if(abs(z-zlast)<Eps_, break); zlast=z)

Charles Greathouse
Case Western Reserve University