Konstantin Keck
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Latest activity by Konstantin Keck-
Konstantin Keck created a post,
Matheuristic: Injecting Heuristic Solutions more regularly
Awaiting user inputHi all,I'm implementing a matheuristic using Gurobi and I’m encountering challenges with achieving a smooth "Ping-Pong" interaction between the solver and my custom heuristic.Goal:My objective is t...
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Konstantin Keck commented,
Hi Riley,Thank you again for your helpful advice.I just wanted to share a quick update regarding my original query on user cuts. In the end, I didn’t implement a callback. Instead, I used the const...
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Konstantin Keck commented,
Hi Riley,thank you for your advice. The gurobi logtools also look very useful.I'll try and work with that.Best regards,Konstantin
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Konstantin Keck commented,
Hi Riley,Thank you for your response!I followed your suggestion: I set PreCrush = 1 and didn’t add cuts. The results remained the same. Just to clarify: the valid inequalities are not modeled as ex...
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Konstantin Keck created a post,
User cuts for relxation
AnsweredHi,I’m currently using Gurobi to solve a LP and have implemented several strong forcing constraints (valid inequalities). These constraints significantly improve the lower bound, especially at the ...