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Re: [Help-glpk] Modelling Advice Request - Project Tasks

From: Jeffrey Kantor
Subject: Re: [Help-glpk] Modelling Advice Request - Project Tasks
Date: Tue, 26 Jan 2010 07:35:01 -0500


Yes, that's the value I found and was using as a benchmark.  We're getting the same results (which is refreshing). Thanks.

For what it's worth, transposing the matrix of coefficients yields a remarkable 4x speedup for that problem which I don't understand at all.


2010/1/26 Andrew Makhorin <address@hidden>
> I #39;m not sure I #39;m getting correct answers.  For the t65d11xx
> problem with gmpl code I got an objective
> value of 283,971 where the claim is that the best known value is
> 237,739.  I #39;m curious what you
> found for an objective value for this example.

I guess you found 237,739 on .
Most probably it is a suboptimal solution obtained with a heuristic.
The exact optimum is 283,971.

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