Date: Mon, 05 Nov 2007 17:01:22 GMT
paul c wrote:
> if those make sense, by the D&D definition of "cartesian product", I
> think r1 |x| r2 would be empty and I presume so would I(r1 |x| r2).
Sorry, let me take that back, I think I should have said intersection, not cartesian product. Received on Mon Nov 05 2007 - 18:01:22 CET