From: Oren BenKiki <orenbk@ri...>  20011123 06:30:35

Clark C . Evans wrote: > A collection is a triplet consisting of two node sets, > the domain and range, together with a function from the > domain onto the range. The domain is restricted such > that only one node from a similar equivalence class may > be a member. Isn't there a less cumbersome way to express this? At any rate... > The term function has its usual meaning: > For any given node in the domain, there exists exactly > one node in the range to which it is associated. Wrong  there is *at least* one such node: one: &1 fish two: *1 BTW, this *is* the "usual meaning" of the word "function"  sin(x) being a trivial example. Have fun, Oren BenKiki 