--- a/src/HOL/UNITY/Simple/Reach.thy Fri Jun 17 11:35:35 2005 +0200
+++ b/src/HOL/UNITY/Simple/Reach.thy Fri Jun 17 16:12:49 2005 +0200
@@ -7,7 +7,7 @@
[this example took only four days!]
*)
-theory Reach = UNITY_Main:
+theory Reach imports UNITY_Main begin
typedecl vertex