Cool to hear that people are interested.
So far, I've implemented a CatalanCatalog class, which keeps lists of
descriptions of Catalan constructions, maps between different
constructions, and functions which enumerate various families of
constructions. It also maintains a directed graph of which
On Thu, Jul 23, 2009 at 8:20 AM, Tom Boothby wrote:
> Richard Stanley currently lists 172 combinatorial interpretations of
> the Catalan numbers. I've been doing some research on Coxeter groups
> this summer, and we recently found that a class of permutations in S_n
> which are counted by the Cat
On Wed, 22 Jul 2009 at 11:20PM -0700, Tom Boothby wrote:
[...]
> I'm mostly doing this for research and for pleasure, but since I'm
> doing the research with a few partners, the code is readable. I'm
> wondering: is there sufficient interest for this to be added to Sage?
> If I manage to construct
You could make the ultimate "proof-without-words" submission!
I think this is cool, and although I am not a combinatorics person at
all it seems reasonable as an addition to sage. I think it could
underpin a really fantastic @interact.
-Marshall
On Jul 23, 1:20 am, Tom Boothby wrote:
> Richar