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Re: [Help-glpk] glpsol (MIP) "-w" output specification, "-y" operatio

From: Johannes Waldmann
Subject: Re: [Help-glpk] glpsol (MIP) "-w" output specification, "-y" operation
Date: Sun, 03 May 2009 15:57:28 +0200
User-agent: Thunderbird (X11/20081227)

That was a quick answer, thanks.

I am programming Haskell, not C,
so going via the API is some work (but perfectly possible).

As a workaround, I was including "display" statements
and parsing their output.

Because I wanted to make some experiments first, and it seems glpsol
does not like the kind of MIP instances my application generates:

I really want to encode constraints of the form  z = max(x,y).  (for
min, likewise).
I know this is not LP. There is an encoding using an additional boolean
variable for each max,
but I have a few hundred of these, and that's apparently too hard for
the solver.
(I also checked with zimpl/scip/soplex and it's similar.)

Best regards, J.W.

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