src/HOL/UNITY/Union.thy

Union primitives and examples

(*  Title:      HOL/UNITY/Union.thy
    ID:         $Id$
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   1998  University of Cambridge

Unions of programs

From Misra's Chapter 5: Asynchronous Compositions of Programs
*)

Union = SubstAx + FP +

constdefs

   Join :: "['a program, 'a program] => 'a program"
    "Join prgF prgG == (|Init = Init prgF Int Init prgG,
			 Acts = Acts prgF Un Acts prgG|)"

end