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Re: [Help-glpk] Question about scaling MIP
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From: |
Andrew Makhorin |
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Subject: |
Re: [Help-glpk] Question about scaling MIP |
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Date: |
Mon, 21 Oct 2013 06:27:54 +0400 |
> > > Where in the source code I have to look at? Any tip for a article about
> > > that?
> >
> > The scaling affects only the basis factorization and the simplex solver.
>
> Let me see if I understanding correctly. When solving a MIP, for each node of
> the tree it scale the problem before use the simplex solver and after the end
> of simplex solver it does the inversion scale?
>
Yes. However, the scaling coefficients are computed only once on entry
to the mip solver.