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2014-01-16 11:06:00 +0100 | commented answer | Use of constraint_generation in MixedIntegerLinearProgram |
2014-01-16 04:38:48 +0100 | commented answer | Use of constraint_generation in MixedIntegerLinearProgram @Nathann - Thanks, this answer clarifies things for me. I still think the source code documentation is formulated incorrectly, but I will take that issue and follow-up questions to sage-support. |
2014-01-16 04:35:50 +0100 | marked best answer | Use of constraint_generation in MixedIntegerLinearProgram
Well I don't see what it unclear here : "coin" does not support constraint generation. It just doesn't work, the solver does not like it. You cannot solve a LP, add a constraint, and solve it again. So, because coin does not support constraint generation, there is a flag that lets you say "I want to use constraint generation, so only give me solvers that support it". If you set this to True, then Coin will never be returned, given that it does not support constraint generation.
What is wrong with that ? |
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2014-01-15 09:53:32 +0100 | commented question | Use of constraint_generation in MixedIntegerLinearProgram The second text-as-link is mangled by the askbot system (was fine in preview); problem with #? |
2014-01-15 09:51:10 +0100 | asked a question | Use of constraint_generation in MixedIntegerLinearProgram I would like to solve an LP problem using row generation (aka constraint generation), where I wish to be able to choose how the constraints are generated (this will be done using SAT, or WPMaxSAT through a binary MIP). Now, in MixedIntegerLinearProgram, there is a boolean option Information found, but which did not make th option clear to me: From the documentation:
From the source code documentation:
(N.B.: Shouldn't that be: backend to Coin is not returned -> Coin backend may be returned?) |