src/HOL/Induct/Tree.thy
changeset 16417 9bc16273c2d4
parent 16174 a55c796b1f79
child 18242 2215049cd29c
--- a/src/HOL/Induct/Tree.thy	Fri Jun 17 11:35:35 2005 +0200
+++ b/src/HOL/Induct/Tree.thy	Fri Jun 17 16:12:49 2005 +0200
@@ -6,7 +6,7 @@
 
 header {* Infinitely branching trees *}
 
-theory Tree = Main:
+theory Tree imports Main begin
 
 datatype 'a tree =
     Atom 'a