#11358: matrix multiplication over ZZ sometimes gives incorrect results
----------------------------------------------------------------------+-----
Reporter: tomc |
Owner:
Type: defect |
Status: positive_review
Priority: critical |
Milestone: sage-5.0
Component: linear algebra |
Resolution:
Keywords: matrix multiplication, multi-modular, integers, ZZ | Work
issues:
Report Upstream: N/A |
Reviewers:
Authors: |
Merged in:
Dependencies: |
Stopgaps: #12710
----------------------------------------------------------------------+-----
Changes (by dsm):
* status: needs_review => positive_review
Comment:
The new patch:
(1) Applies against 5.0.beta8 with minor fuzz.
(2) Seems to eliminate the original bug.
(3) Matches the original diagnosis about where the problem was (use of
repeated primes in a multimodular basis), so I get why it *should* fix the
bug.
(4) Has doctests which verify that .._height now behaves.
(5) The new version passes my separate tests confirming that the other
_extend methods behave too, while the first version didn't.
Positive review.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11358#comment:23>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
