#20288: Arithmetic in QQbar mutates elements
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Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-7.2
Component: number theory | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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When doing arithmetic with a `QQbar` element, operations subtly mutate the
elements which should be constant.
In the example below, we see that `M^2` is displayed differently after we
compute the rank of `M`:
{{{
sage: M = matrix(QQbar, 2, 2, [1, sqrt(-3), -sqrt(-3), 3])
sage: M^2
[ 4.000000000000000? 6.928203230275509?*I]
[-6.928203230275509?*I 12.00000000000000?]
sage: rank(M)
1
sage: M^2
[ 4 6.928203230275509?*I]
[-6.928203230275509?*I 12]
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/20288>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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