Thomas Leveringhaus
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Votes on activity by Thomas Leveringhaus-
Hi Gurobot (AI-generated response), thanks for your reply. In the meantime, I have familiarized myself with the C-API in more detail and understand how CSR & CSC are used here. With regard to the P...
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Hello Jaromił, thanks for your helpful answer. I can work with the limit on the number of variables at the moment by doing some variable eliminations myself, which I would have preferred to leave t...
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Thank you David!
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Hi David, thank you for your answer: Then it is a feature not a bug ;-) But that is a pity for me, because I can't save the new found solution to file during optimization. Is there a special reaso...
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Or maybe Callbacks are called from alle ConcurrentMIP-Instances but maybe identifying "if where == GRB.Callback.MIPSOL" doesn't work properly in different instances?
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Hi David, I have a callback-function like this (in python): def writesolution_callback(model, where): if where == GRB.Callback.MIPSOL: [...] # processing of the solution and creation of t...
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Hi David, I redeveloped/improved my optimization modell. In the past I saw improvements with the heuristic, but actually gurobi does not even start the heuristic although I set PartitionPlace to 31...
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Thanks, that works :-)
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Hi Jaromil, thanks for your answer. Maybe that already answers my question, but I am not totally sure. I think of three statuses, a constraint can have: active, inactive & lazy. If a constraint sta...
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Hi Riley, addGenContrPow is an interesting option. I knew it existed, but it didn't come to my mind to use it for my specific problem ... As far as I know, Gurobi internaly uses some kind of piecew...