The "AutomaticDifferentiation" ring is just the power series ring truncated at degree 2. It can be constructed over RIF:
sage: A.<dx, dy> = PowerSeriesRing(RIF, default_prec=2) sage: 2 / (A((0.99, 1.01)) + dx + 3*dy) 2.? - 2.0?*dx - 6.?*dy + O(dx, dy)^2 -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
