Hi Andrew, On Wed, Oct 16, 2013 at 4:07 PM, Andrew Mathas <andrew.mat...@sydney.edu.au> wrote: > 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!
I have not, because the method was already doing something different (namely, to quote the doc, "Return a list of the cells ``(i,j)`` such that ``self[i][j] > self[i-1][j]``", which means listing all cells in the tableau beneath its first row if the tableau is semistandard), and I got told not to change this. So I implemented the thing anyone would expect from a descents() method as the standard_descents() method on the StandardTableaux class. Maybe the mantra of downwards compatibility isn't always the right thing... 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.
