Michael Winkler
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Gurobi Staff
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Michael Winklerによる最近のアクティビティ-
正式なコメント > 1. The best method for dealing with the large number of necessary constraints is to use lazy constraints.Despite adding lazy constraints in a callback you can also add them or some of them to the...
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正式なコメント Hi Abbas, you can change the type of a variable with by settings it's variable type attribute. E.g., start[0][0].set(GRB.CharAttr.VType, GRB.CONTINUOUS). Best, Michael
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正式なコメント Hi Ritesh, you cannot directly model constraints conditionally on the result of another constraint. Lets assume that you want to minimize your Cost. Then what you could do is add constraints for ...
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正式なコメント Sadly it is currently not possible to "just" reject solutions. I guess by adding so many lazy constraints the LP becomes hard?! Do you know if a valid solution exists, i.e., one you would not cut o...
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正式なコメント Dear Stefan, what bounds do you get when you manually branch on a variable (do you have special knowledge which variable will have a big impact on moving the dual bound or does it not really matt...
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Hi, I'm not sure how your sets I and J are defined but my current guess is that they start from 0. Then I'm also not sure how your x (variables) are defined. I guess that trying to access x[i-1,...
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Hi,to create a Gurobi model from a file you need to pass the file name to the modelconstructor, e.g., GRBModel model = new GRBModel(env, "C:\\Users\\A.Omidi\\Desktop\\flow_shop.mps"); . See also ht...