On 2014-09-05, Nathann Cohen <nathann.co...@gmail.com> wrote: >> I just had a quick look at it, and the following looks downright scary: > > It is one of this code's many wonders. Also, note that : > > sage: Permutation([1,2,3]) > [1, 2, 3] > sage: Permutation((1,2,3)) > [2, 3, 1]
this actually makes perfect sense for someone with some group theory background. (array notation vs cyclic notation) But the idea that one can guess the domain of a permutation given in cyclic notation is dangerous and is virtually guaranteed to cause pain and suffering. Cyclic notation comes from permutation groups, where each has a well-defined domain. Specifying permutations in cyclic notation without specifying the group they live in is akin to specifying a polynomial "by itself", outside of a polynomial ring... Dima -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
