-------- Forwarded Message -------- From: Sascha Brügmann <[email protected]> To: [email protected] Subject: glp_intopt conversion of solutions via callback Date: Mon, 11 Jan 2016 22:05:35 +0100
Hi, I use GLPKs glp_intopt. As I always have an (mostly non-optimal) feasible solution to all of my problem-LPs I need a way to inject these initial solutions. I've tried the callback-way like described here https://lists.gnu.org/archive/html/help-glpk/2012-02/msg00031.html. Question 1: Documentation for GLPK 4.57 chapter "5.2.7 glp_ios_heur_sol" talks about 'original problem' such that one can think that glp_ios_heur_sol accepts a solution for the non-preprocessed-mip which is then converted to preprocessed-mip automatically. This contrasts to what has been written on the upper link i've posted. Who is right? Question 2: If glp_ios_heur_sol requires the provided solution in presolved-mip-format, how can I convert a solution from non-presolved-mip-format (the original LP-problem) to presolved-mip-format? Thanks _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
