#13869: Gamma of complex numbers incorrectly simplifies to factorial
---------------------------+------------------------------------------------
Reporter: JoalHeagney | Owner: AlexGhitza
Type: defect | Status: new
Priority: major | Milestone: sage-5.6
Component: algebra | Keywords: gamma, simplify_full
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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If I type the following into sage-5.5 built from source,
{{{
(gamma(-i-3/2)).simplify_full()
}}}
I get the following result:
{{{
factorial(-I - 5/2)
}}}
This:
{{{
n(factorial(-I - 5/2))
}}}
gives the obvious error:
{{{
TypeError: cannot evaluate symbolic expression numerically
}}}
while:
{{{
n(gamma(-I-5/2))
}}}
gives no problems.
{{{
-0.0417366258078936 + 0.0863691073697635*I
}}}
I've only noticed this happening in 5.5 - no such problems in 5.4 (that I
remember).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13869>
Sage <http://www.sagemath.org>
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