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Re: [Help-glpk] [Fwd: glp_intopt conversion of solutions via callback]

From: Sascha Brügmann
Subject: Re: [Help-glpk] [Fwd: glp_intopt conversion of solutions via callback]
Date: Sat, 16 Jan 2016 15:17:20 +0000 (UTC)
User-agent: Loom/3.14 (

Heinrich Schuchardt <xypron.glpk <at>> writes: 
> When presolving and scaling is switched off you could use
> glp_create_index and glp_find_col
> to identify the column numbers to be used when specifying the solution.
As presolving reduces calculation time it is not an option to deactivate 
it. Using simplex instead of the presolver is also kindof senseless when I 
already have some solution if my understanding is correct.

Michael Hennebry <hennebry <at>> writes:
> Perhaps it would be a good idea to make the presolving and
> scaling transformation available to the user program.
> It could just be a matter of documentation.
> The information must already be somewhere,
> otherwise glpsol could not invert it.
Yes, thats what I'm talking about!

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