In a message dated 10/26/99 3:46:31 PM Eastern Daylight Time, erespess@inil.com writes: << So, how did math work before the concept of "zero" was invented? >> I've heard some interesting things about math in some more primitive societies. I heard of one society in which they had the numbers one, two, and many. And that was it. I think you see this society will never get to even considering something like Geometry until they acheive a more developed sense of differentiation (and won't need the concept of zero), but at the same time I think you see a simple process of differentiation at work as well... Jim