#9240: applying full_simplify() to gamma functions causes an error
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Reporter: tomc | Owner: tomc
Type: defect | Status: new
Priority: major | Milestone: sage-4.4.4
Component: symbolics | Keywords: gamma function, full_simplify,
factorial
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by ddrake):
The patch applies cleanly to 4.4.4.alpha0, fixes the problem and includes
some nice tests. I would give this a positive review, except that I really
don't know the Pynac integration code.
Oh, and you say "For Sage, factorial(x) is only defined if x is a non-
negative integer", but (with a clean 4.4.4.alpha0), it's defined the same
way as Maxima:
{{{
sage: factorial(5)
120
sage: factorial(1/2)
1/2*sqrt(pi)
sage: factorial(1/21)
gamma(22/21)
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9240#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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