src/HOL/Gfp.thy
author kleing
Wed, 14 Apr 2004 14:13:05 +0200
changeset 14565 c6dc17aab88a
parent 14169 0590de71a016
child 15131 c69542757a4d
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(*  Title:      HOL/gfp.thy
    ID:         $Id$
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   1994  University of Cambridge

Greatest fixed points (requires Lfp too!)
*)

theory Gfp = Lfp:

constdefs
  gfp :: "['a set=>'a set] => 'a set"
  "gfp(f) == Union({u. u <= f(u)})"    (*greatest fixed point*)

end