| author | lcp |
| Fri, 19 Aug 1994 11:10:56 +0200 | |
| changeset 116 | ab4328bbff70 |
| parent 0 | 7949f97df77a |
| child 178 | 12dd5d2e266b |
| permissions | -rw-r--r-- |
| 0 | 1 |
(* Title: HOL/gfp.thy |
2 |
ID: $Id$ |
|
3 |
Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
|
| 116 | 4 |
Copyright 1994 University of Cambridge |
| 0 | 5 |
|
| 116 | 6 |
Greatest fixed points (requires Lfp too!) |
| 0 | 7 |
*) |
8 |
||
9 |
Gfp = Lfp + |
|
10 |
consts gfp :: "['a set=>'a set] => 'a set" |
|
11 |
rules |
|
12 |
(*greatest fixed point*) |
|
13 |
gfp_def "gfp(f) == Union({u. u <= f(u)})"
|
|
14 |
end |