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Re: [Help-glpk] glp_intopt runs forever (related to Dusan Plavak's issue

From: Chris Matrakidis
Subject: Re: [Help-glpk] glp_intopt runs forever (related to Dusan Plavak's issue)
Date: Mon, 12 Jun 2017 12:09:46 +0300

Dear Rafael,

> even after scaling your model the ratio between minimum and maximum
> coefficient in the matrix is very big. See below.

I agree that Heinrich's explanation is the most likely one. However I
am curious why this change of behaviour happened with version 4.61.
There are no changes in this version that should affect the simplex
method execution. Did you change anything else in your environment
(like C compiler or compilation flags)? Or are you comparing against
an older version of GLPK (and if so which one)?

Best Regards,

Chris Matrakidis

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