src/HOL/Gfp.thy
author wenzelm
Thu May 18 11:43:57 2000 +0200 (2000-05-18)
changeset 8882 9df44a4f1bf7
parent 3947 eb707467f8c5
child 14169 0590de71a016
permissions -rw-r--r--
fewer consts declared as global;
     1 (*  Title:      HOL/gfp.thy
     2     ID:         $Id$
     3     Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
     4     Copyright   1994  University of Cambridge
     5 
     6 Greatest fixed points (requires Lfp too!)
     7 *)
     8 
     9 Gfp = Lfp +
    10 
    11 constdefs
    12   gfp :: ['a set=>'a set] => 'a set
    13   "gfp(f) == Union({u. u <= f(u)})"    (*greatest fixed point*)
    14 
    15 end