src/FOL/ex/IffOracle.thy

set_cs now includes singleton_inject

(*  Title:      FOL/ex/IffOracle
    ID:         $Id$
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   1996  University of Cambridge

Example of how to declare an oracle
*)

IffOracle = "declIffOracle" + FOL +
oracle mk_iff_oracle
end