#12091: bug in add_constraint to MixedIntegerLinearProgram
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Reporter: dimpase | Owner: ncohen
Type: defect | Status: new
Priority: critical | Milestone: sage-5.0
Component: linear programming | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by ppurka):
Replying to [comment:4 dimpase]:
> I might be clueless, but this asks a modification of the Sage pre-
parser. The pre-parser might be able to add the crap necessary for the
Hell (aka coersion framework) to freeze over and do the right thing...
Not sure about the preparser. But I feel that at least some of the bugs
(the examples I added) can be fixed by modifying the Linear* classes I
mentioned. I had been hacking it for about a day, but I haven't yet got
the right solution. The constants are indeed way more trickier to handle,
since there seems to be no way of knowing when we have normal inequalities
and when we have LP ones.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12091#comment:5>
Sage <http://www.sagemath.org>
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