Simranjit Kaur

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Latest activity by Simranjit Kaur
  • Simranjit Kaur commented,

    Hi Jack, I've just responded through the support ticket. You should receive an email at your email id  ma***91@gmail.com. Thanks,Simran  

  • Simranjit Kaur commented,

    Hi Jack, We have created a support request in our Help Center to assist with your installation issues. We will contact you via the support ticket. Thank you. Cheers,Simran

  • Simranjit Kaur commented,

    The constraints self.model.addConstr(self.Q_prime[t, d, m, k] >= 1 - big_M * (1 - self.BETA[t, d, m, k]))self.model.addConstr(self.Y[d, n, k] <= t + big_M * (1 - self.gama[t, d, n, k])) will be "...

  • Simranjit Kaur commented,

    You can define x as a semi-continuous variable. A semi-continuous variable has the property that it takes a value of 0 or a value between the specified lower and upper bounds. With the Python API, ...

  • Simranjit Kaur commented,

    Hi Kanato, It seems you are missing the m.optimize() command after the mip start file is read (m.read(file_name). For details on how to provide a mip start to a model, please see the article: How d...

  • Simranjit Kaur commented,

    The easiest way to plot a graph like that would be by using Gurobi's open source Python package gurobi-logtools. This package can be used to analyze multiple Gurobi log files easily. There is a Gur...

  • Simranjit Kaur commented,

    Hi Iason, Your screenshot shows the part of the log where the root LP relaxation of your model is solved. The MIP gap calculations will become visible once the solver reaches the Branch and Cut pha...

  • Simranjit Kaur commented,

    Hi Priya, Uncommenting the following constraint will not help since the variable lower bound is still set to 0 by default. mdl.addConstrs( U_a1[i,j]  >= U_lower_bar_a1[i,j] for i in range(0,n) for ...

  • Simranjit Kaur commented,

    Hi Priya, Variables in Gurobi, by default, take a lower bound of zero. If you expect a variable to take a negative value, please set its lower bound to an appropriate negative value. Best regards,S...

  • Simranjit Kaur commented,

    Overall it looks correct. Just two points: 1. The call model.setObjective(0, GRB.MINIMIZE) in the Phase 2 is not required. The following two lines are enough to set the original objective of the mo...