src/HOL/Gfp.thy
author wenzelm
Thu, 26 Jun 1997 11:14:46 +0200
changeset 3462 3472fa00b1d4
parent 1558 9c6ebfab4e05
child 3947 eb707467f8c5
permissions -rw-r--r--
rearrange pages of ps file to be printed as booklet (duplex);

(*  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!)
*)

Gfp = Lfp +

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

end