Hi David, First, thank you for technical explanations. They are compelling.

On Thursday, October 13, 2016 at 9:59:50 PM UTC+2, David Roe wrote: > > > In order to create finite fields with arbitrary variable names that fit > into a lattice of fields, one possibility would be able to give an > algebraic closure explicitly as an argument to GF. Is that what you're > suggesting? > sage: F = GF(3).algebraic_closure('custom') > sage: K9 = GF(9,'b',Fpbar=F) > sage: K81 = GF(81,'c',Fpbar=F) > sage: K81.has_coerce_map_from(K9) > True > Still speaking from a user's point of view, is there also a technical difficulty in keeping just one lattice of fields? So a new creation of a finite field gets automatically fitted into the canonical lattice? -- 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 https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.