#18088: Inconsistency with 0^0
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Reporter: kcrisman | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.7
Component: symbolics | Resolution:
Keywords: pynac | Merged in:
Authors: | Reviewers:
Report Upstream: Reported upstream. Developers | Work issues:
acknowledge bug. | Commit:
Branch: | Stopgaps:
Dependencies: |
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Changes (by rws):
* keywords: => pynac
* milestone: sage-6.6 => sage-6.7
* upstream: N/A => Reported upstream. Developers acknowledge bug.
Old description:
> See [http://ask.sagemath.org/question/26374/evaluation-fail/ this
> ask.sagemath question]. Apparently Ginac says zero to the zero is
> undefined but most of the rest of Sage (in accordance with IEEE) says it
> is one:
>
> {{{
> sage: ZZ(0)^ZZ(0)
> 1
> }}}
>
> but
>
> {{{
> sage: SR(0)^SR(0)
> ValueError: power::eval(): pow(0,0) is undefined
> }}}
New description:
See [http://ask.sagemath.org/question/26374/evaluation-fail/ this
ask.sagemath question]. Apparently Ginac says zero to the zero is
undefined but most of the rest of Sage (in accordance with IEEE) says it
is one:
{{{
sage: ZZ(0)^ZZ(0)
1
}}}
but
{{{
sage: SR(0)^SR(0)
ValueError: power::eval(): pow(0,0) is undefined
}}}
Issue at https://github.com/pynac/pynac/issues/20
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Ticket URL: <http://trac.sagemath.org/ticket/18088#comment:2>
Sage <http://www.sagemath.org>
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