Hello Eduardo, I found the following paper to be insightful for finding better formulations:
Norbert Ascheuer, Matteo Fischetti, Martin Grötschel Solving the Asymmetric Travelling Salesman Problem with Time Windows by Branch-and-Cut Appeared in: Math. Program., Ser. A, Vol 90, No 3: 475-506 (2000) http://opus4web.zib.de/documents-zib/423/SC-99-31.pdf Best regards Xypron -------- Original-Nachricht -------- > Datum: Wed, 10 Nov 2010 16:59:25 +0300 > Betreff: [Help-glpk] Re: GLPK not shows a result > On Wed, 2010-11-10 at 12:59 +0100, Eduardo Sanjurjo wrote: > > Hello, > > > > > > > > I have this AMPL model, but when I execute with GLPK, I can't get any > > results. > > -- GRATIS! Movie-FLAT mit über 300 Videos. Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
