Hello Andrew, How is the presolver invoked for the interior point method? There is no field in glp_iptcp for this purpose.
> It is important to > make sure that all basic solution components (statuses, primal and dual > values) are recovered correctly. I will have to add the code for pushing the transformation on the transformation stack (npp_push_tse()) and to recover. This is missing in the current version. Best regards Xypron -------- Original-Nachricht -------- > Datum: Sat, 16 Oct 2010 01:12:50 +0400 > Betreff: Re: [Help-glpk] Preprocessing > Hi Xypron, > > > I implemented an elimination of linear dependent rows in appended > > glpnpp06.c. > > > > This cuts the solution time for Kevin's problem down from several > > hours to 9 minutes. > > Great! Did you intensively test that transformation? It is important to > make sure that all basic solution components (statuses, primal and dual > values) are recovered correctly. Besides, can it be applied to interior > point and mip solutions? > > > Andrew Makhorin > > -- Neu: GMX De-Mail - Einfach wie E-Mail, sicher wie ein Brief! Jetzt De-Mail-Adresse reservieren: http://portal.gmx.net/de/go/demail _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
