#16504: A mandatory 'nonnegative' argument for
MixedIntegerLinearProgram.new_variable() until the standard changes
-------------------------------------+-------------------------------------
       Reporter:  jdemeyer           |        Owner:
           Type:  defect             |       Status:  needs_work
       Priority:  major              |    Milestone:  sage-6.3
      Component:  linear             |   Resolution:
  programming                        |    Merged in:
       Keywords:                     |    Reviewers:
        Authors:  Nathann Cohen      |  Work issues:
Report Upstream:  N/A                |       Commit:
         Branch:  u/ncohen/16504     |  b1f43af754d4ab7e136015519c7fc0cdbe32dd36
   Dependencies:                     |     Stopgaps:
-------------------------------------+-------------------------------------

Comment (by jdemeyer):

 Replying to [comment:24 dimpase]:
 > Am I correct that this is a safe change in the sense that the existing
 code using `nonnegative=True` as default would either continue to work, or
 will refuse to work? I.e. people won't possibly start getting wrong
 answers?
 Old code should work exactly as before, possibly with a deprecation
 warning.

--
Ticket URL: <http://trac.sagemath.org/ticket/16504#comment:25>
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