Hi Florent and Olivier, Mike pointed out to me that in your patch kshape-om.patch there are functions such as k_boundary, k_interior, k_shape. In addition to is_core, it would be good to have this in sage soon. What is your timeline for your patch? When do you plan to post it on trac? If not soon, would it be ok to put these functions into a separate patch, together with ktableau and KCore, and have them integrated fairly soon?
By the way, as far as I know Andrew Mathas changed k_core and r_core to just core (same for quotient). By the same logic, should KCore and KCores become just Core and Cores? Paul mentions that he would also like to add methods to a potential Cores class. Best, Anne On 7/24/11 3:23 AM, Paul-Olivier Dehaye wrote:
I would be interested to add existing code to such a class, especially things related to abaci and 0-1 sequences. Also a fast iterator over cores would be nice, but I am quite sure the implementation I have could be much improved. Paul On Sun, Jul 24, 2011 at 1:16 AM, Anne Schilling<a...@math.ucdavis.edu> wrote:Hi All! What is the status on a class for cores? Does that exist by now? I would like to have some new methods in Partitions such as is_core and from_core_to_k_bounded which goes from k+1 cores to k-bounded partitions. Currently one can do sage: la = Partition([4,3,3,3,2,2,1]) sage: kappa = la.k_skew(4); kappa [[12, 8, 5, 5, 2, 2, 1], [8, 5, 2, 2]] sage: kappa.row_lengths() [4, 3, 3, 3, 2, 2, 1] but as far as I can see there is no inverse yet for k_skew if only kappa[0] is specified. Best, Anne On 4/9/11 11:11 AM, Florent Hivert wrote:Hi there, Currently the methods core and quotient returns respectively a list and a list of list. Does anyone object on having them return a partition and a tuple of partition ? sage: Partition([7,7,5,3,3,3,1]).core(3) [1, 1] sage: type(Partition([7,7,5,3,3,3,1]).core(3)) <type 'list'> sage: sage: Partition([7,7,5,3,3,3,1]).quotient(3) [[2], [1], [2, 2, 2]] sage: type(Partition([7,7,5,3,3,3,1]).quotient(3)[0]) <type 'list'> In the long term, there could be a particular class for cores (there is already a prototype in the k-tableaux patch). But on the contrary of what is in this patch, I've rather have this class inherits from partitions. Any comments ? Cheers, Florent-- 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.
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