| author | wenzelm | 
| Wed, 03 Feb 1999 16:45:45 +0100 | |
| changeset 6189 | e9dc9ec28a2d | 
| parent 3947 | eb707467f8c5 | 
| child 8882 | 9df44a4f1bf7 | 
| 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 | ||
| 9 | Gfp = Lfp + | |
| 1558 | 10 | |
| 3947 | 11 | global | 
| 12 | ||
| 1558 | 13 | constdefs | 
| 14 | gfp :: ['a set=>'a set] => 'a set | |
| 15 |   "gfp(f) == Union({u. u <= f(u)})"    (*greatest fixed point*)
 | |
| 16 | ||
| 3947 | 17 | local | 
| 18 | ||
| 923 | 19 | end |