Thomas Leveringhaus

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...

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...

Hi Riley, thank you very much for your answer - your suggestion is an interesting "modeling trick" to me. It also gave me another idea to reduce the number of constraints. What do you think about t...

Hi Jaromił, I see the obvious tradeoff between reducing the model size and not getting information from lazy bounds or constraints. FYI:I have huge sets of constraints to prevent islanding in an Op...

Hi whwhwh55,besides the official gurobi articels I don't have additional guidance: Lazy constraints:https://support.gurobi.com/hc/en-us/articles/360013197972https://www.gurobi.com/documentation/10....

Reading this topic, it came to my mind that lazy constraints or the partition heuristic might help address the problem?

Hi Jaromił Najman, thank you very much for your answer, which is still helpfull for me. As far as I know, there is no way to control which variables survive the presolve process, so I can't predifi...

Hi Matthias,   thanks for your detailed reply. It would really be nice, if you would make this feature available in die MATLAB API in some future days ...   With your advices I was able to implemen...

Hi Matthias, thanks for your reply. I am using an sequential optimization approach, in which I solve an approximate MI-QCQP with Gurobi in each sequential step.So I use the integer values from the ...

Hi Sonja, Thank you very much for your answer. It will take me some time to evaluate all the options, but now I know that I can move in that direction. Best regards Thomas