#18386: fix polylog evalf
-------------------------------------------------+-------------------------
Reporter: rws | Owner:
Type: defect | Status:
| needs_work
Priority: major | Milestone: sage-7.4
Component: symbolics | Resolution:
Keywords: pynac special | Merged in:
Authors: Ralf Stephan | Reviewers: Paul
Report Upstream: Fixed upstream, in a later | Masson
stable release. | Work issues:
Branch: | Commit:
Dependencies: #21034 | Stopgaps:
-------------------------------------------------+-------------------------
Changes (by {'newvalue': u'Ralf Stephan', 'oldvalue': ''}):
* status: needs_review => needs_work
* milestone: sage-7.3 => sage-7.4
* author: => Ralf Stephan
Comment:
Ralf, there was a typo in the description of #21034 pointing to #18368
rather than this ticket.
I'm finding this behavior odd:
{{{
sage: polylog(2,.9999999999999999)
1.64493406684822
sage: polylog(2,1.)
NaN - NaN*I
}}}
This doesn't look fixed upstream to me: `evalf` needs to return a numeric
value.
The doctest in `functions/log.py` captures the current behavior, but needs
to be updated before this ticket can be closed.
--
Ticket URL: <https://trac.sagemath.org/ticket/18386#comment:6>
Sage <http://www.sagemath.org>
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