#10505: Round values returned by CPLEX when the variable's type is
integer/binary
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Reporter: ncohen | Owner: ncohen
Type: defect | Status: new
Priority: major | Milestone: sage-4.6.1
Component: linear programming | Keywords:
Author: Nathann Cohen | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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CPLEX is a funny guy who does not understand that 1.546846847 e-17 is not
a proper value for a binary variable. As I often forgot to replace test
``== 1`` by ``> .5`` and as it is anyway what CPLEX should return, this
patch rounds values given to the variables before returning them when it
is sound. It amounts to copying two lines from ``is_variable_continuous``
in the ``get_variable_value`` method, and doctests pass better with CPLEX
(which is not the case with the new patch for TSP #10497)
Nathann
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10505>
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