On 02/24/2001 04:43:41 PM Richard Cook wrote:

>Whence does this terminology derive? Set or Mapping theory?

I learned it in high school algebra.


>Anyone
>recommend a definitive text?

I have handy the book from a topology course I took that gives definitions:
Munkres, James A. 1975. Topology: A first course. Prentice-Hall.


>I imagine there are more such terms ...

Of terms, there is no end.


>e.g., what is it called if there are elements left over in the domain
>(but not in the codomain)? "Ejective"? I'm feeling "Dejective" for not
>knowing these terms already ...

But at least you recognised something that was likely to have been given a
name: surjective.



- Peter


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Peter Constable

Non-Roman Script Initiative, SIL International
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