Is there any easy way of building up what I'd call a ring of exponentials (maybe there's a better word)? For example I'd like to work in the ring QQ[[2^j for j in Integers()]]: the ring with coefficients in Q and elements 2^j where j is an integer (or possibly just a non-negative integer). Such things arise naturally when considering difference equations. Such a ring should also have a difference operator Delta(f)(x) := f(x+1)-f(x). In fact the ring that I mentioned might also be embedded in an even bigger ring -- of all functions
f: Integers() --> QQ Has anybody built such a thing? Victor -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
