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 5360 topics
Maxmin fairness problem M H 9:33 AM
Multi-Compartment VRP With Electric heterogenous fleet reinoud fonken 5/21/18
Dual variable of a constraint (python) Juan Zhang 5/21/18
Erro in specifying data in Ampl Javiera Espinoza 5/20/18
Linearity of mod and div operators Ronicass 5/20/18
error : Constraint _scon[1] is not convex quadratic since it is an equality constraint. marios gavaletakis 5/20/18
MILP sahebe...@gmail.com 5/20/18
Availability of tuple (data structure) in AMPL Udoy Paul 5/19/18
Need help to code the following equation Udoy Paul 5/17/18
Vehicle Routing Problem - How to Account for Time Windows? kevin.r...@gmail.com 5/17/18
How to write AMPL for this constraint? Vinh K 5/17/18
AMPL IDE - Change Directory Problem Mahraz Amini 5/17/18
detecting convexity phonenix2016 5/16/18
Unsuccessful declaration of a table Ellen 5/16/18
Is it possible to add gap ?? Help şeyma doğan 5/15/18
CPLEX 12.8.0.0: integer infeasible. 1828 MIP simplex iterations, 316 branch-and-bound nodes, No basis. nabil...@gmail.com 5/15/18
Shadow price doesn’t work in AMPL version 20180123 using solver CPLEX 12.7.1 Chia-Chun Tsai 5/15/18
a specific question on part of the AMPL model Sattar Ezzati 5/15/18
Connection problem between ampl and Matlab interface 王莹 5/14/18
Splitting _ampl_elapsed_time Peter Greistorfer 5/13/18
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