AMPL Modeling Language

This is a discussion and help group for AMPL, an algebraic modeling language for optimization problems of many kinds.  AMPL lets people use common notation and familiar concepts to formulate models and examine solutions, while the computer manages communication with appropriate solvers.

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Showing 1-20 of 4067 topics
Help with indexed sets Víctor Mario Noble Ramos 5/23/16
"Presolve constraint cannot hold" -> I want to output data to a file in this case. 5/23/16
Differente Reduced cost values obtained with cplex and minos Alessandro Oscar Gilardino Arias 5/23/16
model updates with display command 5/23/16
Re: [AMPL 11995] Reading sets from .txt Victor 5/23/16
Display printf, one line missing Sam 5/23/16
Re: AMPL ISSUES Victor 5/23/16
how to represent this variables? 5/23/16
Constraint problem (if then else?) Sam 5/23/16
CPLEX crashed after solving a problem when using the drop command of AMPL Tiancivalen 5/21/16
Issues with Parampl Installation Lorenzo Magnolfi 5/21/16
I got a problem with my model g y 5/19/16
how to express sum{i in A, j in B: i>=2, j>=2} x[i,j]; 5/19/16
documented ampl example of: implementation of "Lagrangean relaxation" and "Dantzig-Wolfe decomposition" Albani 5/19/16
CPLEX giving solution to MILP problem while COUENNE doesn't give any solution to MINLP Rupsana Parveen 5/17/16
ampl-cplex: ampl timing parameter misbehaving (version issue?) 5/16/16
for statements 5/16/16
CPLEX solution pool - Can't store/write solutions into solution pool 5/16/16
Minimization cost problem 5/15/16
RE: [AMPL 11945] linearization variable is always equal to zero ?? Robert Fourer 5/15/16
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