Combinatorics

[Cameron Laird]

In article <6690be63-aad6-4d55-8043-6d2d2af885de at i29g2000prf.googlegroups.com>,
 <bearophileHUGS at lycos.com> wrote:
>Michael Robertson:
>> I'm guessing sage has this, but shouldn't something like this be part of
>> the standard library (perhaps in C)?
>
>My answer is positive. As a reference point you can look at the
>combinatorics module of Mathematica.
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Should combinatorics be part of the standard library?  That's
an aesthetic-pragmatic question I don't feel competent to 
answer; I look to timbot and Guido and so on for judgment there.
It does occur to me, though, that even more widely applicable
than the combinatorics module of Mathematica (if only because of
its licensing) might be such resources as 
A.  http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465
B.  http://www.sagemath.org/doc/html/ref/node181.html
C.  http://web.archive.org/web/20070306153113/http://www.unixreview.com/documents/s=10089/ur0606j/