#12091: chained inequalities bug in add_constraint to MixedIntegerLinearProgram
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Reporter: dimpase | Owner: ncohen
Type: defect | Status: needs_info
Priority: major | Milestone: sage-5.4
Component: linear programming | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by vbraun):
I've removed the "cdef double c" in `show()`, so the following works:
{{{
sage: p = MixedIntegerLinearProgram(solver= 'ppl')
sage: x = p.new_variable()
sage: p.set_objective(x[1] + 1/2*x[2])
sage: p.add_constraint(-3/5*x[1] + 2/7*x[2], max=2/5)
sage: p.show()
Maximization:
x_0 + 1/2 x_1
Constraints:
constraint_0: -3/5 x_0 + 2/7 x_1 <= 2/5
Variables:
x_0 is a continuous variable (min=0, max=+oo)
x_1 is a continuous variable (min=0, max=+oo)
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12091#comment:34>
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