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[Help-glpk] Re: unbounded ray
From: |
Andrew Makhorin |
Subject: |
[Help-glpk] Re: unbounded ray |
Date: |
Thu, 11 Dec 2003 11:55:15 +0300 |
>After running lpx_simplex, if the objective is unbounded,
>is there a way to query for an unbounded ray or for the
>corresponding nonbasic variable?
It is funny, but currently there is no way to do that. I will add
corresponding routine in the next release to obtain the number of a
(non-basic) variable which causes unboundness. Knowing that variable
it is possible to compute the ray itself by using lpx_eval_tab_col.
However, if there is a need to have such routine right now, please
inform me, and I will post a patch to the mailing list.
Andrew Makhorin