Marco Correia
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Activity overview
Latest activity by Marco Correia-
Marco Correia commented,
Perfect, thank you!
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Marco Correia commented,
Thank you both!Doesn't model.reset() basically throws away everything, like starting from scratch? It says this in the docs:> Reset the model to an unsolved state, discarding any previously compute...
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Marco Correia commented,
Right. I suppose the mipsolver has a bunch of information not captured just by saving the current model to a file (like current search tree, heuristic scores, etc). So ideally, I would like for a w...
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Marco Correia created a post,
Removing lazy constraints
AnsweredHi,I have a mip with some non-linear but convex constraints, that I enforce using lazy constraints posted from a callback while solving.I will have to solve this mip several times, where some of th...
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Marco Correia created a post,
Apparently feasible start solution ignored.
AnsweredHi, I am providing an initial feasible start solution to gurobi, but it prints: > User MIP start did not produce a new incumbent solution It then proceeds to finding what looks like that solution u...
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Marco Correia commented,
Hi Marika, Looking at the log myself made me realize that one of the lazy constraints was not so deterministic after all :) All good with gurobi, thanks!
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Marco Correia created a post,
Resolving after changing objective does not use previous solution
AnsweredHi, I have a model which I solve to optimality. After, I change the objective, and call "optimize()" again. Gurobi says the previously found solution did not produce an incumbent. I cannot see why,...
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Marco Correia commented,
Hi Matthias, Not sure if you don't have anything else to add, or if this thread was forgotten. I don't think I understand how this works yet (see post above). Thanks
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Marco Correia commented,
Hi Matthias, Thanks for the clarification, indeed I am talking about lazy constraints here. I am not sure I understood what you mean. If gurobi never gives me the chance to add the missing lazy con...
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Marco Correia created a post,
Opportunity for lazy cut
OngoingHi, I believe I've read the answer to this question before, but I don't remember where or what it was, my apologies. Assume we have a problem with 3 variables, x,y,z, and constraints x<=y<=z. Lets...