#18787: Bug with products of symbolic variables with modular integers
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Reporter: tmonteil | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.8
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Description changed by rws:
Old description:
> As reported on [http://ask.sagemath.org/question/27196/multiplying-
> matrices-with-different-parents/ this ask question]
>
> {{{
> sage: _ = var('A,B')
> sage: (A + 3*B)*Zmod(9)(6)
> 0*B
> }}}
>
> while the result should be `6*A`.
New description:
As reported on [http://ask.sagemath.org/question/27196/multiplying-
matrices-with-different-parents/ this ask question]
{{{
sage: _ = var('A,B')
sage: (A + 3*B)*Zmod(9)(6)
0*B
}}}
while the result should be `6*A`. There is even (with the 6.6 Linux
tarball)
{{{
sage: (3*A + 3*B + 1)*Zmod(9)(6)
6
sage: (3*A + 3*B)*Zmod(9)(6)
<------------ !!
sage:
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/18787#comment:12>
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