Forwarded Message
From: Prabhu Manyem
To: Andrew Makhorin , Neill Clift
Subject: GLPK Linear Programming solver
Date: Tue, 28 Jun 2022 14:39:01 +0930
> Hello,
>
> About the GLPK Linear Programming solver 5.0, running Linear
> Programming models:
>
> For some instances, when I run the solver from inside a C program,
> using the statement
> glp_simplex(mis1, NULL),
> I get a solution which is fully Integer... For every variable, I
> obtain an integer value.
>
> However, when I run the same model in Linux command line, using the
> command
> glpsol --nomip --simplex --lp Max_Clique_model.lp
> I get an optimal solution with the SAME objective function value, but
> now, some variables are NOT integers... I get a fractional solution.
>
> Why the difference between the 2 methods?
> How to fix this problem for the command line execution of GLPK?
>
> Thank you very much for your help.
>
> Dr Prabhu Manyem
> Retired Professor of Applied Mathematics
> Nanchang Institute of Technology
>