Amin Ahmadi

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Recent activity by Amin Ahmadi Recent activity Votes
  • MIPGAP not closed


    Hello, I am solving a location-transportation optimization problem (Gurobi-Python) that is not challenging with the small number of nodes according to the literature.   In order to optimize the sol...

  • How add constraints temporarily to the model?


    Hi, I am implementing an iterative method for solving a problem. We need to have a set of constraints in the model at one iteration but not necessary for the subsequent iterations. One way is to re...

  • Customized branching rule


    I have three questions about the selection strategy in the B&B method in Gurobi. As I understood, we cannot find out how Gurobi branches in each iteration. But, I need to control the branching stra...

  • Copying Model


    Hello, I generate a model with several decision variables and constraints. Let's call it Model_1. Next, I want to use Model_1 and add  new constraints to it in a while loop. However, after the loop...

  • Large LP problem

    I want to solve a large lp problem until the first feasible solution is found. (I do not want to spend too much time on it).  Also, I want to give 5 minutes extra time to find a possible better sol...