From: mittelmann@asu.edu Subject: Re: Simplex Date: Fri, 28 Apr 2000 13:25:30 GMT Newsgroups: sci.math.num-analysis Summary: [missing] Hello from Plato, are you saying your friend wants a Fortran code capable of solving MILP (mixed integer LP) problems? I am assuming that. There are such codes, for example at DoIT, see towards bottom of page http://plato.la.asu.edu/topics/problems/nlores.html This would limit the size of the problems somewhat. Larger MILP problems can be solved by a few codes, see http://plato.la.asu.edu/topics/problems/nlores.html#LP-problem that I made available as binaries (BonsaiG, MOMIP). One uses MPS input and usually creates this by writing in LP-format and then calls LP2MPS (see above). Problems that are still larger require commercial codes. Note also the other solvers listed as well as the websubmission possibilities listed under that name in the Decision Tree Guide. I forgot one thing: your friend uses Linux, right? Should he be using Windows only, that limits the choice considerably, but still see what you find in the above places. Hans Mittelmann ---------------------------------------------------------------------- In article <39094DE4.7F967848@e119ws1.tuwien.ac.at>, Dietmar Trummer wrote: > A friend of mine tries to solve mixed optimisation problems > (both continuous and discrete) for logistics purposes and therefore > he needs a good simplex algorithm (at best in fortran) to use on > his pc (downloadable). > Is a library like netlib or Plato the right choice for him? > Or should he look somewhere else? > > Thanks for any help, > Dietmar > > -- > Dietmar Trummer Tel. ++43 +1 58801 119 43 > Institute of Econometrics Fax: ++43 +1 58801 119 99 > TU Wien > Argentinierstr. 8 / 119 email: dtrummer@e119ws1.tuwien.ac.at > A-1040 Vienna www.eos.tuwien.ac.at > Sent via Deja.com http://www.deja.com/ Before you buy.