I implemented something similar for permutations 'cause I needed it: http://hg.sagemath.org/sage-main/src/f0ee3538887fe739601babb54e177ec5e1133b7a/sage/combinat/permutation_cython.pyx?at=default
On Wed, Dec 4, 2013 at 1:52 PM, Nathann Cohen <nathann.co...@gmail.com> wrote: > Helloooooo everybody ! > > I got an email from a Sage user who wants to enumerate something, and I'd > need to generate a Gray Code in order to make it faster. And it looks like > Sage cannot do that from my google searches. I would like to list all the > subsets of a Set in a "Gray Ordering". Actually, I would like to know which > bit changes at each step. Aaaaaand well. Is there anywhere ? > > If it is not in Sage yet 1) that is shameful for us 2) where would you like > to see it if I implement it ? > > I warn you, there will be bitwise C operations somewhere and a Python class > above to expose it :-P > > Thanks ! > > Nathann > > P.S. : If you answer this message, *PLEASE* also answer on sage-devel. > > -- > 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. -- 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.
