#12220: Updated CBC spkg
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Reporter: ncohen | Owner: ncohen
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-4.8
Component: linear programming | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author: Nathann Cohen
Merged: | Dependencies:
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Comment(by ncohen):
By the way, this is more or less what happens already with Coin : I met
this problem of not being able to add constraints then resolve the LP when
adding to Sage the first lienar programs using constraint generation.
Which is precisely that : solve, add a constraint, solve again, add a
constraint, etc...
The function get_solver (
http://www.sagemath.org/doc/reference/sage/numerical/backends/generic_backend.html
) has a parameter named ``constraint_generation``, which is just there to
have the method return the "best solver installed on the machine", except
Coin if constraint generation is necessary. I hoped that perhaps by
changing the backend this limitation would disappear, but well.... I do
not want to say "you can use constraint generation with Coin" if it just
amounts to copy many times the solver. It would just be bad code, nothing
else.
Nathann
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12220#comment:29>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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