src/HOL/Gfp.thy
author paulson
Mon Oct 07 10:28:44 1996 +0200 (1996-10-07)
changeset 2056 93c093620c28
parent 1558 9c6ebfab4e05
child 3947 eb707467f8c5
permissions -rw-r--r--
Removed commands made redundant by new one-point rules
clasohm@1475
     1
(*  Title:      HOL/gfp.thy
clasohm@923
     2
    ID:         $Id$
clasohm@1475
     3
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
clasohm@923
     4
    Copyright   1994  University of Cambridge
clasohm@923
     5
clasohm@923
     6
Greatest fixed points (requires Lfp too!)
clasohm@923
     7
*)
clasohm@923
     8
clasohm@923
     9
Gfp = Lfp +
clasohm@1558
    10
clasohm@1558
    11
constdefs
clasohm@1558
    12
  gfp :: ['a set=>'a set] => 'a set
clasohm@1558
    13
  "gfp(f) == Union({u. u <= f(u)})"    (*greatest fixed point*)
clasohm@1558
    14
clasohm@923
    15
end