src/ZF/upair.thy

Moved definitions (binary intersection, etc.) from upair.thy back to ZF.thy

(*  Title:      ZF/upair.thy
    ID:         $Id$
    Author:     Lawrence C Paulson and Martin D Coen, CU Computer Laboratory
    Copyright   1993  University of Cambridge

Dummy theory, but holds the standard ZF simpset.
	(This is why the +end is present.)
*)

upair = ZF +

end