Jonasz Staszek
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Recent activity by Jonasz Staszek-
Hi, is there any particular reason you load Gurobi by from .gurobipy import * ? Normally one would expect to load it like this: from gurobipy import * If this doesn't help, please let us know, addi...
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Hi Sanket, I am not sure I got your question right. Let's start from the easier part: if you want to query the value of any variable during the optimization process, you should use a callback. Coul...
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Hi Sanket, Generally speaking, Porta and Polymake can guide you towards finding strong, potentially facet-defining inequalities for your problem. The best way you could benefit from using Porta or ...
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Dear Sanket, you should turn to some other software package, e.g. Porta or Polymake to perform polyhedral analysis (i.e. to get a description of the convex hull you look for) As far as I know the t...
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Hi Burcu, adding some meaningful names to your constraints. the documentation of the addConstrs() method mentions the 'name' parameter, which you can use to give your constraints a name. The same...
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Hi Burcu, this article should be of help. I would also recommend that you do add some meaningful names to your constraints. This way, it will be easier to analyze the IIS. You should also try gener...
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Hi Qiru, as discussed here, indicator constraints require binary variables as indicator variables. You may need to add an auxiliary binary variable to represent the relationship between \( E_i \) a...
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We then need more information. There could be many sources of the difficulties you see. What is the mathematical model you are trying to optimize? Which parameters did you already specify? Best reg...
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Dear Weng, based on the title of the question and the pasted log I take that you would like to improve the solution time for your model. The first thing I would look at is the MIPFocus parameter - ...
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Dear Florian, you seem to be using numpy arrays to come up with an objective statement, which is - in your case - a Gurobi QuadExpr. I would invite you to explore that section and to build your \( ...