Sophie Wuyckens

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Latest activity by Sophie Wuyckens
• Sophie Wuyckens commented,

I see. Well here is the thing, I have tried a model where I was trying to minimize a function $$f'$$ directly representing a linear combination of binary variables associated with additional flow c...

• Sophie Wuyckens commented,

• Sophie Wuyckens commented,

Hi Jaromil, I tried both solutions you proposed and it does not change anything, it still solves the LP and stops there. Using mipsol call back, it complains I don't use MIPNODE while using cbGetNo...

• Sophie Wuyckens commented,

Hi Jaromil, Yes that's the thing. No nodes are displayed at all. The model finds an optimal solution and stops. Thank you for your follow up. Gurobi 9.5.0 (linux64) logging started Thu Jun  9 17:5...

• Sophie Wuyckens commented,

Hi Jaromil, Marika, I don't have difficulties to include a callback. It actually enters the callback, what it does not is to enter the condition where == GRB.Callback.MIPNODE. Anyways, here is my c...

• Sophie Wuyckens created a post,

How to generate lower bounding constraints ?

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Hello, I would like to implement a branch-and-cut decomposition by minimizing a lower bounding variable z. The idea is to solve a relaxed version of my model (*) and then iteratively modify it by i...

• Sophie Wuyckens commented,

Hi Jaromil, Thank you very much. Very informative, exactly what I needed to know. Regards, Sophie

• Sophie Wuyckens created a post,