On Wed, 18 Jan 2023, Andrew Makhorin wrote:
-------- Forwarded Message --------
Date: Tue, 17 Jan 2023 20:33:01 -0800
Subject: Integer solutions
To: '[email protected]' <[email protected]>
From: [email protected]
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If I call glp_simplex without specifying that any variables be
integers and then call glp_intop it looks like it at least makes the
objective function an integer.
IIRC that is not how gpl_intop is supposed to work.
In any case, why are you calling glp_intop.
case first would be faster. Likewise I determine feasibility of a
system of inequalities with a zero objective and want to do this in
both reals and then integers.
I try to avoid a zero objective if I can.
The solver's selection mechanisms will encounter a lot of ties.
Of course 'tis possibe that GLPK has mechaanisms
specificaly for a zero objective.
Perhaps Andrew will tell us.
--
Michael [email protected]
"Occasionally irrational explanations are required" -- Luke Roman
