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 happening I think that's great!
Andrew On Wednesday, 16 October 2013 20:32:11 UTC+2, darijgrinberg wrote: > > Hello Jean-Yves, hello Andrew, > > I guess I should have something to say about this but I don't really > understand what is happening. When I wrote the #7983 patch, I was > being annoyed by the fact that there was no method on the Tableaux > class computing what everyone in combinatorics calls the descents, > whereas the descents() method on tableaux was computing something > rather unrelated (that, moreover, depends only on the shape if the > tableau is semistandard). I suspect the descents() method was some > kind of helper function for Jack or H-L related code. Anyway, I > decided to rename the old descents() method into a less ambiguous name > and to make descents() compute the actual descents. But I've quickly > got talked out of this, as this would deprecate some userbase code, so > instead I added a standard_descents() method and left descents() > untouched (only adding the warning to its doc). I was working on > sage-main all the time. > > Now, Jean-Yves (who, as far as I understand, has been using > sage-combinat) is saying he has been using descents() all the time and > since he is talking about standard tableaux, I assume that function > has been computing the actual descents rather than whatever it has > been computing on sage-main. Does this mean that the descents() > function on sage-combinat has been doing something completely > different from that on sage-main all the time before my #7983 patch? > That someone had done what I first had in mind (rename the old > descents() and reuse the name for the actual descents) long ago, and > now that my #7983 got merged in, the roles have switched? > > Either way, sorry for contributing to this muckup and thanks a lot for > any help in understanding it. > > Best regards, > Darij > -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-combinat-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-combinat-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-combinat-devel. For more options, visit https://groups.google.com/groups/opt_out.
