Marco Correia
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Activity overview
Latest activity by Marco Correia-
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...
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Marco Correia commented,
Hi Mario! Thanks for the answer, that makes sense!
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Marco Correia created a post,
Column generation when number of rows depend on number of columns
AnsweredHi! I'm trying to solve a MIP with gurobi using column generation. The novel thing (for me) about this problem, is that the set of rows in the problem depends on the set of columns. That is, whenev...