#12823: Allow constants for objective function & deletion of rows in
MixedIntegerLinearProgram
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Reporter: john_perry | Owner: ncohen
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.0
Component: linear programming | Resolution:
Keywords: solver objective | Work issues:
Report Upstream: N/A | Reviewers:
Authors: john_perry, ncohen | Merged in:
Dependencies: 12833 | Stopgaps:
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Comment (by john_perry):
Why do you enumerate the constraints in coin_backend, maybe others? Why
not simply loop i from 0 to len(constraints)?
More: I don't understand this:
{{{
for i,c in enumerate(constraints):
if i < 0 or i >= nrows:
sage_free(rows)
raise ValueError("The constraint's index i must satisfy 0 <= i <
number_of_constraints")
rows[i] = constraints[i]
}}}
Seems to me the test should be
{{{
if c < 0 or c >= nrows:
}}}
shouldn't it? and then you could have
{{{
rows[i] = c # same as constraints[i]
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12823#comment:11>
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