src/HOL/Gfp.thy
author clasohm
Wed Nov 29 16:44:59 1995 +0100 (1995-11-29)
changeset 1370 7361ac9b024d
parent 923 ff1574a81019
child 1475 7f5a4cd08209
permissions -rw-r--r--
removed quotes from types in consts and syntax sections
     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 consts gfp :: ['a set=>'a set] => 'a set
    11 defs
    12  (*greatest fixed point*)
    13  gfp_def "gfp(f) == Union({u. u <= f(u)})"
    14 end