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 5314 topics
3-dimensional data structure and storage efficiency Peter Greistorfer 1:21 PM
Syntax error + ORIG is not a set 12:58 PM
Urgent: Having difficulty with logical expression in a constraint Yash Chauhan 12:48 PM
what is wrong with my model ? صالح الفوزان 10:40 AM
if command - problem!! şeyma doğan 10:13 AM
MINOS: Show Lagrange Multipliers Ignacio MADRID CANALES 8:50 AM
AMPL CPLEX Big M Constraint and Indicator Constraints Erin Mullin 7:39 AM
warm start in AMPL API Mahraz Amini 4:43 AM
What's mean "no basis" in this problem? Cristian Vera 4/23/18
Vehicle Routing Problem - How to Account for Time Windows? 4/23/18
optimal solution is found while the constraint is not satisfied Mahraz Amini 4/23/18
expanding a constraint 4/23/18
order of periods 4/23/18
IPOPT finds the optimal solution on the second solve! Mahraz Amini 4/23/18
Presolve error handling Peter Greistorfer 4/22/18
Knitro in Parallel Andy 4/21/18
Maximum Flow of a graph Khalil Mebarkia 4/21/18
AMPL drops cuts - why? Peter Greistorfer 4/20/18
define problem in a loop Luca Mencarelli 4/20/18
Problem with table declaration (from ASCII text table) of indexed subset Mathilde Bourque 4/20/18
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