From: Devin Mullins Date: 2005-08-12T13:55:07+09:00 Subject: Re: NEWBIE QUESTION: pattern with nil Kev Jackson wrote: >> http://mathworld.wolfram.com/OrdinalNumber.html > > Yeah I have to agree here, integers are a Set of values based on a > single number line (according to my recollection), > reals/floats/engineering units are also a Set of values that exist on > this line (with them both exist the negative values), and for complex > numbers we have to expand into 2 dimensions. Woah, woah, woah. Integers are just things that satisfy a specific set of axioms. The cool Georgian definition is just one way of defining a bunch of items that are Integers, as much as anything that satisfies those axioms are Integers. Isomorphism is a wonderful thing. Devin