Re: Do Data Models Need to built on a Mathematical Concept?

> > Ok, let me try to understand:
> > "A *binary relation* from A to B is a subset of A x B."
> > Since (NULL) is a subset of AxB, it is a binary relation!!!
> > Since ((b,j)) is a subset of AxB, it is a binary relation.
> > Since ((b,j), (b,k)) is a subset of AxB, it is a binary relation.
> > Since ((b,j), (b,k), (b,l)) is a subset of AxB, it is a binary
> > relation. and so on....
>
> Exactly so.

So you really believe NULL is a binary relation? So you really believe a set consisting of binary relations IS A binary relation? Received on Tue May 06 2003 - 21:30:04 CEST