#17527: Echelon form of a matrix is sometimes pickled incorrectly
------------------------+-----------------------------------------
Reporter: pbruin | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-6.5
Component: pickling | Keywords: matrix echelon pickle
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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The following bug seems to be somewhat subtle; for example, the wrong
result does not arise when using the polynomial ring instead of its
fraction field, or when changing the ordering of the pair `t`.
{{{
sage: K.<x> = FractionField(QQ['x'])
sage: m = Matrix([[1], [x]])
sage: t = (m, m.echelon_form())
sage: s = dumps(t)
sage: t
(
[1] [1]
[x], [0]
)
sage: loads(s) # wrong, should be the same as above
(
[1]
[x], [1, x]
)
}}}
This is a dependency of #10513.
--
Ticket URL: <http://trac.sagemath.org/ticket/17527>
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