Zahra Hoobakht

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Recent activity by Zahra Hoobakht Recent activity Votes

  • non zero variable

    Answered

    Hi  I have a variable that is in the interval of -1 and 1 but it cannot be zero. I would be appreciate if you help me to define the constraints properly. m = gp.Model()phi_0 = m.addVar(vtype=gp.GRB...

    Zahra Hoobakht 2 followers 1 comment 0 votes

  • Unable to convert argument to an expression

    Answered

    Hi  I am trying to define my objective function but I am getting "Unable to convert argument to an expression" error. I am using the Sympy library because I need to get Hessian of some matrices bas...

    Zahra Hoobakht 2 followers 3 comments 0 votes

  • unbdray

    Answered

    Hi my second stage problem is infeasible. I would appreciate it if you could say how can I extract unbounded rays for the dual of the second stage problem? I write dual of it and I used  Dualproble...

    Zahra Hoobakht 2 followers 1 comment 0 votes

  • Unbdray does not give me correct answer

    Ongoing

    Hello, I am trying to solve a problem in two ways with and without Benders decomposition. extract unbdrays and add them to my Master problem but when I extract them and put them into (w)(d-Bx)=<0 i...

    Zahra Hoobakht 2 followers 2 comments 0 votes