Marika Karbstein
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Recent activity by Marika Karbstein-
When you do matrix multiplication, the dimensions need to match. You need to use MVar.transpose().Respecting the dimension of matrix I, the line should be m.addConstr(A.transpose() @ A == I)
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Hi Runqiu, No, the difference is that your callback does not do anything during presolve. Because you have if where == GRB.Callback.MIP: Hence, presolve is completed and not interrupted because of ...
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Hi Runqiu, As long as you set a time limit that is smaller or equal to 7200 before calling self.m.optimize(callback=stop_at_feasible) your callback function is useless. When setting the time limit...
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How many variables have a non-zero coefficient in one constraint (on average)?Could you reduce the problem so that you can write an MPS file? Then, compare the memory consumption when building the ...
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Hi Nikola, If I understand correctly, out-of-memory occurs when model building. Then, using the Gurobi cloud will not help.I think there is no other way than trying to identify what exactly causes ...
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I have the same experience. And I did not find any solution for this.For me, the only option is to set termination parameters in the code when running Gurobi in Jupyter notebook, i.e., set TimeLimi...
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Hi Matteo, With Gurobi 10, the memory requirements for the barrier were massively overestimated in some cases. Setting the BarOrder parameter helped here to not run in this overestimation. This iss...
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Please have a look at our Tutorial: Preparing a Minimal Reproducible Example.
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Please check the answers in this post.
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Hi Ludwig, In your code, you have modeled if "finish"=1 then "beet_flow"=0,This relation does not restrict "beet_flow" in case "finish" has the value 0. So, you can have both 0.You probably want to...