src/CCL/gfp.thy
author clasohm
Tue, 16 Nov 1993 14:24:21 +0100
changeset 124 858ab9a9b047
parent 0 a5a9c433f639
permissions -rw-r--r--
made pseudo theories for all ML files; documented dependencies between all thy and ML files

(*  Title: 	HOL/gfp.thy
    ID:         $Id$
    Author: 	Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   1992  University of Cambridge

Greatest fixed points
*)

Gfp = Lfp +
consts gfp :: "['a set=>'a set] => 'a set"
rules
 (*greatest fixed point*)
 gfp_def "gfp(f) == Union({u. u <= f(u)})"
end