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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
BTW, this *is* the "usual meaning" of the word "function" - sin(x) being a