most recent 30 from http://www.or-exchange.com 2010-07-31T01:00:10Z http://www.or-exchange.com/feeds/tag/mip http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://www.or-exchange.com/questions/26/open-source-free-mip-solver Mark 2009-11-18T08:20:00Z 2010-04-07T14:08:35Z

<p>I am solving big optimization models (more than 100k variables) with the academic version of CPLEX but I'd like to see if I can find an open source alternative, I solve mixed integer problems (MILP) and CPLEX works great but it is very expensive if I graduate (which will hopefully happen someday in the future). so I really need to find an alternative or start writing my own optimization library (which will be painful)</p> <p>Any suggestion/insight would be much appreciated</p> <p>Any feedback on <a href="http://www.gnu.org/software/glpk/" rel="nofollow">GLPK</a> or lp_solve? </p>

http://www.or-exchange.com/questions/80/how-do-you-decide-whether-mip-or-cp-is-more-appropriate CLC 2009-12-01T15:34:56Z 2009-12-11T13:42:21Z

<p>What are some guidelines for deciding whether a MIP or CP approach is more appropriate for modeling an optimization problem? Or in what cases should CP be used instead of MIP?</p>

http://www.or-exchange.com/questions/19/good-ways-to-work-around-the-big-integrality-gap-caused-by-big-m-formulations-in Mathieu Bouchard 2009-11-17T14:13:50Z 2009-11-19T16:25:37Z

<p>I would like to know some common approaches to work around the big integrality gap caused by big M formulations in MIP proplems.</p>