Hi Darij,
I still have a sage-5.4.1 with all combinat patches up to december 2012 on
another machine, and t.descents()
does what I expect. I admit that descents is a bad name for this (these
are the descents of the inverse
permutation of the row reading in French convention, in French we use
Hi Jean-Yves and everyone,
OK, so it seems that some patch on the sage-combinat queue as of
sage-5.4.1 solved the descents() problem in a more radical way than my
sage-main patch. When my patch got merged into sage-main, the
sage-combinat page would no longer apply, and so descents() once again
Perhaps I can add a couple of words to Andrew's answer:
I guess that the short (but harsh) answer is that if you have code which
relies upon some one else's code which is in the queue, but which is not yet
merged into sage, then there is no guarantee that
your code will work next year, or
Hey Andrew and Jean-Yves,
Looking at the patch queue, robinson_schensted_inverse was depreciated in
trac8392 http://trac.sagemath.org/attachment/ticket/8392. It seems to
have been replaced with RSK_inverse which just seems wrong to me: with
tab-completion I don't see the need for random
Hi Darij,
I've not yet needed descent sets of tableaux in sage so I don't know what
the code did previously or what it does now in this respect. I would hope,
however, that a descents method for tableaux would return the descent set
of a tableau, so if you have ensured that this is now
