On Fri, Mar 6, 2015 at 1:35 PM, Travis Scrimshaw <tsc...@ucdavis.edu> wrote: > The lower-case version is meant to be a functorial construction and IIRC > eventually replace the CamelCase version. The closest thing to getting it to > work currently is: > > sage: C = cartesian_product([Set([1,2,3]), Set([1,2,3])]) > > but it currently doesn't have a working iterator. > > However, no one has time to work on this because certain people are > always raising hell in other parts of combinat and drawing our time and > energy away from doing these things and they have with a strong resistance > to anything related to categories. >
Does that mean that you would be happy if sage: cartesian_product([[1,2,3], [1,2,3]]) did work? And that it not working is just due to lack of time, rather than some fundamental design decision? (IIRC cartesian product was originally included in sage by Joel Mohler, who has long since worked in industry...) William > Travis > > > > On Friday, March 6, 2015 at 1:19:14 PM UTC-8, Volker Braun wrote: >> >> I've never used the lower-case version, but always this: >> >> sage: CartesianProduct([1,2,3], [1,2,3]) >> Cartesian product of [1, 2, 3], [1, 2, 3] >> sage: list(_) >> [[1, 1], [1, 2], [1, 3], [2, 1], [2, 2], [2, 3], [3, 1], [3, 2], [3, 3]] >> >> >> >> On Friday, March 6, 2015 at 8:00:06 PM UTC+1, William wrote: >>> >>> Hi, >>> >>> I'm unhappy that this doesn't work: >>> >>> sage: cartesian_product([[1,2,3], [1,2,3]]) >>> BOOM! >>> >>> It seems clear from the docstring that this not working is >>> intentional. Is anybody opposed to making the above work (again? I >>> think it did for years, but not sure). >>> >>> William >>> >>> >>> >>> -- >>> William (http://wstein.org) > > -- > 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. -- William (http://wstein.org) -- 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.
