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Re: [Help-glpk] [Fwd: randomization in MIPs]
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From: |
Andrew Makhorin |
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Subject: |
Re: [Help-glpk] [Fwd: randomization in MIPs] |
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Date: |
Mon, 17 Dec 2012 15:58:01 +0400 |
> So, depending on the random seeds, your instance can be solved in 79 or
> 1816 sec.s (!!)
>
Looks like a black magic.
I encountered this when developed a mip preprocessing. At some moment it
was absolutely unclear to me to which form the original instance should
be transformed.