Yeah, I also found some morphisms in the polynomial ring code, but like the QQ <-> ZZ code, it seemed dated (and hence might not follow recommended practices).
As for sage.algebras.*, I didn't really see anything other than Boolean return values. On Fri, Jun 6, 2014 at 9:21 AM, Vincent Delecroix <20100.delecr...@gmail.com > wrote: > 2014-06-06 17:12 UTC+02:00, Travis Scrimshaw <tsc...@ucdavis.edu>: > > I don't think there's much documentation beyond what's in > > _coerce_map_from_() in Parent. > > > > If it returns re, then it uses _element_constructor_ to construct the > > morphism. Otherwise you return a morphism. I think there's some examples > in > > > > src/algebras which returns morphisms (I'm pretty sure I've seen it, > > definitely wrote some code on it, but I don't remember off-hand for > what). > > Two other examples are ZZ -> QQ and QQ->ZZ which are respectively a > Morphism and a Map (see sage/rings/rational.pyx at the very end of the > file). > > -- > 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. > -- Andrew -- 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.
