The problem with adding any new "numbers" to the real numbers is that we inevitably end up with a system that does not obey all of the arithmetic and order properties of the reals.
A brief summary of some extensions and the erosion of properties is given in http://en.wikipedia.org/wiki/Real_number#Generalizations_and_extensions Best wishes, John ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
