| author | nipkow |
| Sat, 13 Nov 2004 07:47:34 +0100 | |
| changeset 15281 | bd4611956c7b |
| parent 15140 | 322485b816ac |
| child 15381 | 780ea4c697f2 |
| permissions | -rw-r--r-- |
| 1475 | 1 |
(* Title: HOL/gfp.thy |
| 923 | 2 |
ID: $Id$ |
| 1475 | 3 |
Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
| 923 | 4 |
Copyright 1994 University of Cambridge |
5 |
||
6 |
Greatest fixed points (requires Lfp too!) |
|
7 |
*) |
|
8 |
||
| 15131 | 9 |
theory Gfp |
| 15140 | 10 |
imports Lfp |
| 15131 | 11 |
begin |
| 1558 | 12 |
|
13 |
constdefs |
|
| 14169 | 14 |
gfp :: "['a set=>'a set] => 'a set" |
| 1558 | 15 |
"gfp(f) == Union({u. u <= f(u)})" (*greatest fixed point*)
|
16 |
||
| 923 | 17 |
end |