src/HOL/Lfp.thy
author oheimb
Wed Jan 31 10:15:55 2001 +0100 (2001-01-31)
changeset 11008 f7333f055ef6
parent 10212 33fe2d701ddd
child 11609 3f3d1add4d94
permissions -rw-r--r--
improved theory reference in comment
     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 + Product_Type +
    10 
    11 constdefs
    12   lfp :: ['a set=>'a set] => 'a set
    13   "lfp(f) == Inter({u. f(u) <= u})"    (*least fixed point*)
    14 
    15 end