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Re: [Help-glpk] Infinite cycles


From: Andrew Makhorin
Subject: Re: [Help-glpk] Infinite cycles
Date: Wed, 11 Jan 2017 22:34:55 +0300

On Wed, 2017-01-11 at 19:52 +0100, Heinrich Schuchardt wrote:
> glpsol -m GLP_buggy.mod  --norelax
> runs fine.
> 
> glpsol -m GLP_buggy.mod
> loops for ever.
> 
> I tested with the GLPK 4.61 prerelease.
> 

Currently the primal simplex (used by default) is less numerically
stable that the dual simplex. Try

glpsol --dual ...

to choose the dual simplex. It may help (but only if you have glpk
4.60).





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