Hello Kasper, could you, please, supply the complete file exhibiting the error.
Best regards Xypron -------- Original-Nachricht -------- > Datum: Fri, 21 Oct 2011 08:50:38 +0200 > Betreff: Re: [Help-glpk] Division > Thx for the answers guys. > They helped a lot. > > And yes, there is an error. o should be > 0 but for some reason if I > change > that, GLPK says "strict bound not allowed"? > o is in the range 1..3 > C is expected to be in 1..10 plus/minus > S could be as large as 200K-300K > > Best regards, > Kasper > > On Thu, Oct 20, 2011 at 1:09 AM, Michael Hennebry < > [email protected]> wrote: > > > On Wed, 19 Oct 2011, Kasper Tordrup wrote: > > > > s.t. phase{u in U, j in 1..3}: sum{s in S} ((ps[s] * y[s,j,u]) / > o[s,u]) = > >> d[j,u]; > >> > >> But since division with o[s,u] is not linear I can't do that. > >> So can anyone explain how one could make the constraint linear? > >> > >> set S; > >> set U; > >> param ps {s in S}, integer, > 0; > >> var y {s in S, j in 1..3, u in U}, binary; > >> var o {s in S, u in U}, integer, >= 0; > >> var d {j in 1..3, u in U}, integer, >= 0; > >> > > > > It took me a while to analyze Xypron's solution. > > It works if you make the change: > > > > s.t. c{u in U, j in 1..3, s in S}: sum{o in O} y[s,j,u,o] <= 1; > > The original y[s,j,u] is allowed to be zero. > > > > -- > > Michael [email protected] > > "Pessimist: The glass is half empty. > > Optimist: The glass is half full. > > Engineer: The glass is twice as big as it needs to be." > > > > > > -- > *Kasper Tordrup - Stud. M. Sc. > IMADA @ University of Southern Denmark > [email protected] - +45 27 44 58 49* -- Follow me at http://twitter.com/#!/xypron NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie! Jetzt informieren: http://www.gmx.net/de/go/freephone _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
