Decision Optimization

Decision Optimization

Delivers prescriptive analytics capabilities and decision intelligence to improve decision-making.


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  • 1.  Constraints after Presolve

    Posted 02/12/16 12:16 AM

    Originally posted by: prasr29


    I am solving a MIP model using Cplex concert technology in C++.
    I can see that presolve in Cplex eliminates a large number of constraints and variables from my model. I am interested to further know the constraints and variables that remain in my model post presolve. Is there a way to find that?

     


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  • 2.  Re: Constraints after Presolve

    Posted 02/15/16 09:47 AM

    Please search the Forum for an answer. Similar/same questions have been asked before, even recently.

    The short answer is: In C++ Concert there is no access to the presolved model, hence you cannot get the information you want. The best you can do is find the fixed variables for example in a heuristic callback.


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