
Cheng-Lung Chen
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Activity overview
Latest activity by Cheng-Lung Chen-
Cheng-Lung Chen commented,
Hi Jaromił, Thank you so much and save my life!!!
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Cheng-Lung Chen created a post,
Can we add user cuts on root node only?
AnsweredHi, I believe this is an easy question but I couldn't find any related post. In my branch-and-cut, below is how I code the user cut callback if where == GRB.Callback.MIPNODE: status = MyModel.c...
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Cheng-Lung Chen commented,
Hello Maliheh, Thanks for responding! I did a couple of experiment and you are correct. The Gurobi presolve, heuristics and cuts are so powerful that the optimization performance is actually better...
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Cheng-Lung Chen created a post,
Branch-and-cut performance and PreCrush
AnsweredHello, I am implementing a branch-and-cut algorithm with my own user cuts. Initially, I forgot to change the PreCrush parameter to 1. I quickly realize this is necessary for user cut callback and ...