David Torres Sanchez
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Gurobi Staff
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David Torres Sanchezによる最近のアクティビティ-
Hi Martin, Is the heuristic only there to improve speeds, or does it change optimization overall, then? Indeed, the partition heuristic is just there to improve incumbent solutions and performanc...
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For reference see: Discourse (example and hack). Gurobi.jl#19 (to track fix) Cheers, David
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Hi Vijay, I have turned this into a ticket. Cheers, David
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Hi Goran, Can you try writing the MPS/LP file from Pyomo and then using the Gurobi command to compute the IIS?I don't know enough about Pyomo to understand why your approach doesn't work. gurobi_cl...
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Hi Brannon, Each variable has a VBasis attribute with values: 0 (basic), -1 (non-basic at lower bound), -2 (non-basic at upper bound), and -3 (super-basic). Each linear constraint has CBasis attr...
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Hi Jiajie,Please see the following similar community post.Cheers, David
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Hi Zhizhen, The error comes from the bounds of the resulting sin variables, the ones containing \(\texttt{out}\).The constraints imply these variables must be negative, but the default LB of a vari...
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Hi Jacob, I will try the parameters (again - it seems like a constant game of enabling and disabling parameters...) and see if it helps. Reformulating the problem to avoid large coefficient range...
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Hi Jacob,This looks like a perfect example of a model with bad numerics (no warnings, but it is a very big model).I'd first recommend upgrading to the latest version (10.0.1).If the problem persist...
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Hi Nicolai,DualReductions affects presolve.You are also setting different presolve parameters (Presolve + PreSparsify).I would suggest removing these parameters as well as DualReductions, the model...