#11358: matrix multiplication over ZZ sometimes gives incorrect results
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Reporter: tomc | Owner: jason, was
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-4.7.1
Component: linear algebra | Keywords: matrix multiplication,
multi-modular, integers, ZZ
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Changes (by dsm):
* status: new => needs_review
Comment:
Okay, here's my first attempt. Because another function calls
_new_random_prime assuming that it correctly avoids duplication I had to
change my intended approach a bit, but it should work.
Two other minor changes:
(1) as mentioned above, mpz_crt_vec_tail() has what looks to me like
vestigial code, and I've removed it.
(2) the documentation for replace_prime_c claimed that it would replace a
prime with a greater prime, but made no efforts to ensure the "greater
than" part. I've changed the doc accordingly.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11358#comment:9>
Sage <http://www.sagemath.org>
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