#13869: Gamma of complex numbers incorrectly simplifies to factorial
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Reporter: JoalHeagney |
Owner: burcin
Type: defect |
Status: new
Priority: major |
Milestone: sage-5.6
Component: symbolics |
Resolution:
Keywords: gamma, simplify_full, simplify_factorial, maxima | Work
issues:
Report Upstream: N/A |
Reviewers:
Authors: |
Merged in:
Dependencies: |
Stopgaps:
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Changes (by JoalHeagney):
* keywords: gamma, simplify_full => gamma, simplify_full,
simplify_factorial, maxima
Comment:
Hah hah hah.
You won't believe this, but I went to the maxima-bugs newsgroup and found
out that maxima has the following behaviour:
(%i2) float((%i + 3)!); [[BR]](%o2) 4.980156681183563 %i +
1.5494982830181063
So, the issue seems to be:
- maxima treats x! and gamma(x+1) identically in regards to dealing with
complex numbers (which I think is mathematically appalling).
- so if there's any difference between sagemath and maxima regarding (3 +
i)!, it's sagemath's doing.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13869#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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