On Wed, Jun 20, 2012 at 06:19:30PM +0200, Florent Hivert wrote:
> sage: A = WQSymOperad(QQ)
> sage: A[{1,2}, {3}]
> A[12,3]
> sage: A.an_element()
> A[_,a,n,_,e,l,e,m,e,n,t,_]
That's a cute one :-)
Just out of curiosity, what does A.basis().keys().an_element() give?
Cheers,
Hi --
I already asked this, but no one seemed to have an opinion on that...
I have now implemented 5 or 6 bijections between Dyck paths and
subsets of permutations (pattern-avoiding or noncrossing). I think
that it is not practical to have a name for each of them since they 1.
do not necessarily
On Wed, Jun 20, 2012 at 11:32:44PM -0700, Anne Schilling wrote:
> Hi!
>
> Currently, the following patch does not apply:
>
> applying update-dot2tex-nt.patch
> applying sage-demos-and-tutorials-nt.patch
> patching file doc/en/reference/combinat/index.rst
> Hunk #1 FAILED at 3
> 1 out of 1 hunks F
Hi Christian,
> I already asked this, but no one seemed to have an opinion on that...
>
> I have now implemented 5 or 6 bijections between Dyck paths and
> subsets of permutations (pattern-avoiding or noncrossing). I think
> that it is not practical to have a name for each of them since they 1.
>
