bug-glpk  

Re: [Bug-glpk] [Fwd: preprocessing goes into infinite loop]

Andrew Makhorin
Tue, 17 Jan 2012 08:18:06 -0800

> I suggest that the problem due to missing bounds should be gracefully
> detected and a meaningful message should be displayed to the user.

In principle, a warning message would be useful. However, glpk is able
to correctly process unbounded integer variables. The bug appear due to
insufficient robustness of the mip preprocessor--there should be a check
that an lower/upper bound of an integer variable increases/decreases too
much.


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