MG

Gurobi-versary
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Latest activity by MG
  • MG commented,

    Thank you David, I have written an algorithm which uses the callback method to insert two types of lazy constraints. I  want to spilt this in two different callbacks. The first callback shoud add n...

  • MG created a post,

    Having 2 implemented Callback methods

    Answered

    Hello everybody, can I implement 2 callback methods for one lp? My goal is to first calculate the first callback until the lp finds a solution and afterwards call another callback method which has ...

  • MG commented,

    Thank u so much Jaromil, I guess that is exactly what I was searching for :).  

  • MG created a post,

    How to set the Method as a parameter

    Answered

    Hello everyone, I have an heuristic and i want to tell gurobi to solve this heuristic with broken variables only with the simplex or dual algorithm. I have searched the documentation and it says th...

  • MG commented,

    Hello Matthias, I have found the problem, tho the matrix is uni modular but actually there is always a way to implement an lp-heuristic. But the problem here are the constraints that as u said push...

  • MG commented,

    Thank u Matthias, the Matrix is in fact totally uni-modular and the is always a opt solution. That is not the point, I am implementing an algorithm for an Operational-Interval-Scheduling-Problem wh...

  • MG created a post,

    How to implement an LP Relaxation with Gurobi

    Answered

    Hello everybody, I am trying to implement a LP-Relaxed Program. In my real program the variables are binaries and all is fine ex: GRBVar var = model.addVar(0.0, 1.0, 0.0, GRB.BINARY, "x"+job.getJob...