#17489: remove redundant factorial() from rings/arith.py
-----------------------------+------------------------
Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.5
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Description changed by rws:
Old description:
> The `rings` version apparently gets overwritten on import. One should
> provide the much slower algorithms `gmp` and `pari` from that version.
>
> It's a defect because the `reference/misc/sage/rings/arith.html`
> documentation makes users expect the `algorithm` keyword to work but
> {{{
> sage: y=factorial(10^6,algorithm='gmp')
> ---------------------------------------------------------------------------
> ...
> TypeError: __call__() got an unexpected keyword argument 'algorithm'
> }}}
New description:
The `rings` version apparently gets overwritten on import. One should
provide the much slower algorithms `gmp` and `pari` from that version.
It's a defect because the `reference/misc/sage/rings/arith.html`
documentation makes users expect the `algorithm` keyword to work but
{{{
sage: y=factorial(10^6,algorithm='gmp')
---------------------------------------------------------------------------
...
TypeError: __call__() got an unexpected keyword argument 'algorithm'
}}}
While we're at it, adapt the function's behaviour to what other CASs
(sympy, Wolfram) do at integer n<-1: return unsigned infinity.
--
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Ticket URL: <http://trac.sagemath.org/ticket/17489#comment:1>
Sage <http://www.sagemath.org>
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