Anne Schilling <a...@math.ucdavis.edu> writes: > Hi! > > I just added a new patch on trac which implements the Schuetzenberger > involution on both words and tableaux and also the promotion operator > on tableaux of arbitrary shape: > > http://trac.sagemath.org/sage_trac/ticket/10446
I found that it doesn't work for arbitrary tableaux :-) Would it be better if it worked for arbitrary posets? I guess that the user interface is the main issue: as a method for posets, input and output are linear extensions. Can we "automatically" (I mean, in SAGE) identify a SYT with a linear extension of a appropriate poset? How about SSYT? Martin sage: t = Tableau([[3, 2, 1]]) sage: t.promotion(2) --------------------------------------------------------------------------- AssertionError Traceback (most recent call last) AssertionError: A tableau must be a list of lists of weakly decreasing length. sage: sage: t = Tableau([["a", "b", "c"]]) sage: t.promotion(2) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) TypeError: unsupported operand parent(s) for '-': 'Integer Ring' and '<type 'str'>' -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
