src/HOL/Lfp.thy
author wenzelm
Mon Oct 20 11:25:39 1997 +0200 (1997-10-20)
changeset 3947 eb707467f8c5
parent 1558 9c6ebfab4e05
child 8882 9df44a4f1bf7
permissions -rw-r--r--
adapted to qualified names;
     1 (*  Title:      HOL/Lfp.thy
     2     ID:         $Id$
     3     Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
     4     Copyright   1992  University of Cambridge
     5 
     6 The Knaster-Tarski Theorem
     7 *)
     8 
     9 Lfp = mono + Prod +
    10 
    11 global
    12 
    13 constdefs
    14   lfp :: ['a set=>'a set] => 'a set
    15   "lfp(f) == Inter({u. f(u) <= u})"    (*least fixed point*)
    16 
    17 local
    18 
    19 end