diff -r f04b33ce250f -r a4dc62a46ee4 Subst/UTLemmas.thy
--- a/Subst/UTLemmas.thy	Tue Oct 24 14:59:17 1995 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,20 +0,0 @@
-(*  Title: 	Substitutions/utermlemmas.thy
-    Author: 	Martin Coen, Cambridge University Computer Laboratory
-    Copyright   1993  University of Cambridge
-
-Additional definitions for uterms that are not part of the basic inductive definition.
-*)
-
-UTLemmas = UTerm + Setplus +
-
-consts
-
-  vars_of       ::   "'a uterm=>'a set"
-  "<:"          ::   "['a uterm,'a uterm]=>bool"   (infixl 54) 
-
-rules  (*Definitions*)
-
-  vars_of_def   "vars_of(t) == uterm_rec(t,%x.{x},%x.{},%u v q r.q Un r)"
-  occs_def      "s <: t == uterm_rec(t,%x.False,%x.False,%u v q r.s=u | s=v | q | r)"
-
-end