AMPL

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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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Topics (6026)
Replies Last Post Views
[AMPL 1175] Problems with SNOPT by Cristian.Foix.Castil...
1
by Hans Mittelmann
Problems with SNOPT 7.2 by Cristián Foix
0
by Cristián Foix
[AMPL 767] Declaration of variables which can take finite integer values by Shrinivas Sale
4
by Robert Fourer-2
[AMPL 1164] Compiling the solver "GJH" for AMPL? by charles.martel@gmx.n...
8
by Hans Mittelmann
[AMPL 1111] strange memory access violation error by charles.martel@gmx.n...
2
by charles.martel@gmx.n...
[AMPL 1136] Can I put derivatives into the objective function? by charles.martel@gmx.n...
2
by charles.martel@gmx.n...
[AMPL 1151] Take inputs from GUI and convert it into .mod file by lildreamie
1
by Robert Fourer-2
Assigning two parameters to each other in an ordered set by Phil.Kleff
3
by Phil.Kleff
[AMPL 1155] ampl not retrieving values from heuristic by Steven Harrod
0
by Steven Harrod
[AMPL 1153] About the solver for a nonlinear mixed integer problem. by gtaljan@gmail.com
1
by Hans Mittelmann
[AMPL 1140] Presolve (cplex) by Steven Harrod
1
by Robert Fourer-2
[AMPL 1126] suppress some error messages by ziming guan
6
by Robert Fourer-2
[AMPL 1134] how to change the display format of variables by Luna-5
1
by Robert Fourer-2
[AMPL 1129] display something infeasible by ziming guan
1
by Robert Fourer-2
[AMPL 1076] make ampl stop at near optimality by Carl He
5
by Carl He
[AMPL 1130] How to get the root LP lower bound/time when solving IP? by mipcop
2
by Steven Harrod
[AMPL 1142] Fwd: Arc and Node Declarations by Steven Harrod
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by Steven Harrod
[AMPL 1141] Arc and Node Declarations by Steven Harrod
0
by Steven Harrod
[AMPL 1137] Strange termination code. by Largillier Thomas
1
by Robert Fourer-2
[AMPL 1135] small bug with shell command by Steven Harrod
0
by Steven Harrod
[AMPL 1122] This same information is available in other file formats including the XML based RSS and CAP formats. by local anesthetic
0
by local anesthetic
[AMPL 1112] Alignment of the solution printed by AMPL by ziming guan
5
by Robert Fourer-2
fix command by marcusnohl
0
by marcusnohl
[AMPL 1105] use a for loop to calculate some values but in reverse order of a set by ziming guan
4
by ziming guan
[AMPL 1091] really strange error message by Carl He
2
by Carl He
[AMPL 1094] Odd Behaviour of Cplex Presolve=0 by Steven Harrod
2
by Steven Harrod
[AMPL 1101] Re: my problem.. by Robert Fourer-2
1
by Steven Harrod
[AMPL 1079] Set of sets in AMPL? by Carl He
1
by Robert Fourer-2
[AMPL 1095] Bestbound by Steven Harrod
1
by Robert Fourer-2
[AMPL 1096] Odd comment behaviour by Steven Harrod
0
by Steven Harrod
[AMPL 1092] Strings and compound elements as entries in parameters? by Carl He
1
by Steven Harrod
[AMPL 1087] Is there a function for returning the number of elements of a set in AMPL by Carl He
2
by Carl He
[AMPL 1065] Check Statement Behaviour by Steven Harrod
1
by Robert Fourer-2
[AMPL 1062] Setting up .mod files by asugrad
1
by Robert Fourer-2
[AMPL 1081] Multiple Processes by Steven Harrod
3
by Steven Harrod
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