#5415: wrong definition of multifactorial?
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Reporter: cwitty | Owner: robertwb
Type: defect | Status: new
Priority: major | Milestone: sage-4.1.2
Component: basic arithmetic | Keywords:
Reviewer: | Author:
Merged: |
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Comment(by kcrisman):
Replying to [comment:5 robertwb]:
> I needed the double factorial for something (I can't even remember what
now) so I just wrote this. It sounds like there's several competing
definitions, but wikipedia is not necessarily the most authoritative.
(I think it was for making sure gamma(3/2) etc. were correct.)
>
> I would ask on sage-combinat what the "right" definition is, they're
more likely to know.
But one should definitely document that there isn't a universally agreed-
upon definition.
Can you indicate what one would change in integer.pyx? Changing things
that seem right yield horrible allocation errors.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5415#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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