#12019: doctest failure in linear_programming.rst (multiple correct solutions)
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
Reporter: emil
| Owner: ncohen
Type: defect
| Status: new
Priority: minor
| Milestone: sage-4.8
Component: linear programming
| Keywords: doctests, linear programming,
GLPK, multible solutions
Work_issues: assessment if funtionality is tested elsewhere, if not create
TEST section with example with unique solution, change help docstring so users
are aware of multible solutions | Upstream: N/A
Reviewer:
| Author:
Merged:
| Dependencies:
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{{{
sage -t -force_lib "devel/sage/doc/en/thematic_tutorials/
linear_programming.rst"
**********************************************************************
File "/mnt/sda6/COMPILE/sage-4.7.2/devel/sage/doc/en/
thematic_tutorials/linear_programming.rst", line 366:
sage: [e for e,b in matching.iteritems() if b == 1]
Expected:
[(0, 1), (6, 9), (2, 7), (3, 4), (5, 8)]
Got:
[(1, 6), (0, 4), (2, 3), (5, 8), (7, 9)]
**********************************************************************
}}}
The result is correct but it is different from the expected solution. The
tested problem has multible solutions and it seems that the result os the
example is machine dependent.
the proposed fix is to flag the example as "not tested" and also to change
the documentation that users are aware that there might be more than one
solution.
I don't know the reason for this dependency but Nathann Cohen mentioned it
might depend on the GLPK library.
http://groups.google.com/group/sage-
devel/browse_thread/thread/e1886d5ba5ade945
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12019>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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