src/ZF/upair.thy

Arith: less_diff_conv
List: [i..j]

(*  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.
*)

upair = ZF