On 1 October 2015 at 15:10, William Stein <wst...@gmail.com> wrote: > On Thu, Oct 1, 2015 at 12:00 PM, Bill Page <bill.p...@newsynthesis.org> wrote: >> ... Clearly the related? concept of >> "element" is borrowed from category theory - maybe even topos theory? > > Yes, parents and elements are from Magma. To me they have nothing to > do with category theory. Category theory is one level up, and is > about abstracting away from thinking about parents and elements (and > instead thinking about objects, morphisms, and functors). Just as > Bill Hart said, the parent/element approach in magma is very useful, > and inspired Sage and Nemo, but isn't category theory. >
Thanks. I was thinking of elements as morphisms, as in that branch of category theory. -- 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.
