[plt-scheme] Natural numbers

On Mar 11, 2009, at 11:06 PM, Jos Koot wrote:

> Usually the letter 'Z;' is used for the set of complex numbers (Q  
> for rational numbers and N for natural numbers). If n is a complex  
> number, then what is the meaning of 'n>=0'?
> You confuse me.

Again, we evidently have very different mathematical upbringings.   
All the way through my (U.S.) college and graduate school years, Z  
meant the integers, and C meant the complexes.  What country did you  
study in?

Stephen Bloch
sbloch at adelphi.edu