#17658: Incorrect densification of polynomial matrix
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Reporter: gagern | Owner:
Type: defect | Status: new
Priority: critical | Milestone: sage-6.5
Component: linear algebra | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/gagern/ticket/17658 | 84f7248720bb3ab274ed97ac00aa0bc56c072924
Dependencies: | Stopgaps:
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Changes (by gagern):
* commit: => 84f7248720bb3ab274ed97ac00aa0bc56c072924
Comment:
Found the problem: ETuple won't convert to regular tuple, and won't have
the same hash either. For this reason, we should make sure that our dict
keys are regular tuples. Preferably of Python integers.
I left the doctest with the method I used to observe this problem. If you
would prefer it in the module-level docstring of the
`matrix_generic_sparse.pyx` file, feel free to move it there or tell me
that I should move it. If you have some other place to suggest, let me
know.
----
New commits:
||[http://git.sagemath.org/sage.git/commit/?id=84f7248720bb3ab274ed97ac00aa0bc56c072924
84f7248]||{{{Convert keys of generic sparse matrix to pair of ints.}}}||
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Ticket URL: <http://trac.sagemath.org/ticket/17658#comment:4>
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