author | clasohm |
Thu, 08 Dec 1994 12:50:38 +0100 | |
changeset 199 | ad45e477926c |
parent 178 | 12dd5d2e266b |
permissions | -rw-r--r-- |
(* Title: HOL/gfp.thy ID: $Id$ Author: Lawrence C Paulson, Cambridge University Computer Laboratory Copyright 1994 University of Cambridge Greatest fixed points (requires Lfp too!) *) Gfp = Lfp + consts gfp :: "['a set=>'a set] => 'a set" defs (*greatest fixed point*) gfp_def "gfp(f) == Union({u. u <= f(u)})" end