# [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