William, [please forward to sage-devel since I'm not sure I'm allowed to post there]
> The implementation of RR and CC in Sage are a very direct wrapping of > MPFR, which is the most well-thought out efficient implementation of > floating point real numbers I've ever seen. It is worth visiting > http://www.mpfr.org/mpfr-current/mpfr.html and searching for > "infinity". thank you for the pointer. However for questions whether Inf should be in RR or not, the MPFR documentation does not say much. About this topic, I recommend to look at the discussions around the P1788 standard for interval arithmetic : <http://grouper.ieee.org/groups/1788/>. Best regards, Paul -- 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/groups/opt_out.