On Fri, 12 Aug 2005, Austin Ziegler wrote: > Um. No wonder you're having problems, if you are trying to teach him > things that aren't real. I'll be the first to admit that I'm weak, > but I don't recall arithmetic or numerical theory being based on set > theory (that is, numbers as sets). http://mathworld.wolfram.com/OrdinalNumber.html John Carter Phone : (64)(3) 358 6639 Tait Electronics Fax : (64)(3) 359 4632 PO Box 1645 Christchurch Email : john.carter / tait.co.nz New Zealand Carter's Clarification of Murphy's Law. "Things only ever go right so that they may go more spectacularly wrong later." From this principle, all of life and physics may be deduced.