Inconsistency with 0^0

[kcrisman]

See 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 pynac/pynac#20

Depends on #18362

Upstream: Fixed upstream, in a later stable release.

Component: symbolics

Keywords: pynac

Author: Ralf Stephan

Branch/Commit: 4df15dd

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/18088

[rwst]

Changed keywords from none to pynac

[rwst]

Upstream: Reported upstream. Developers acknowledge bug.

[rwst]

Branch: u/rws/inconsistency_with_0_0

[rwst]

New commits:

4df15dd

18088: doctest for fix of pynac issue 20

[rwst]

Commit: 4df15dd

[rwst]

Changed upstream from Reported upstream. Developers acknowledge bug. to Fixed upstream, in a later stable release.

[rwst]

Author: Ralf Stephan

[rwst]

Dependencies: upcoming pynac-0.3.6

[kcrisman]

comment:5

Should such tickets be "sage-pending", since the upcoming pynac isn't (yet) on a Sage ticket (or maybe it is since I last looked)? Just a procedure question, not a high priority question.

[rwst]

Changed dependencies from upcoming pynac-0.3.6 to #18362

[tscrim]

comment:9

LGTM.

[tscrim]

Reviewer: Travis Scrimshaw

[vbraun]

Changed branch from u/rws/inconsistency_with_0_0 to 4df15dd