#10072: Bug in log gamma evaluation
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Reporter: kcrisman | Owner: AlexGhitza
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.6.1
Component: basic arithmetic | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: easy patch to write |
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Changes (by zimmerma):
* status: new => needs_work
* work_issues: => easy patch to write
Comment:
I found the reason of the bug. In {{{symbolic/pynac.pyx}}}, function
{{{py_lgamma}}}, it is
written {{{CC(x).log().gamma()}}} instead of {{{CC(x).gamma().log()}}}:
{{{
sage: CC(I).log().gamma()
-0.0219785471672303 - 0.168184318273662*I
sage: CC(I).gamma().log()
-0.650923199301856 - 1.87243664726243*I
}}}
If somebody provides a patch, I will review it.
Paul
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10072#comment:10>
Sage <http://www.sagemath.org>
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