src/ZF/Induct/PropLog.thy
changeset 16417 9bc16273c2d4
parent 12610 8b9845807f77
child 18415 eb68dc98bda2
--- a/src/ZF/Induct/PropLog.thy	Fri Jun 17 11:35:35 2005 +0200
+++ b/src/ZF/Induct/PropLog.thy	Fri Jun 17 16:12:49 2005 +0200
@@ -6,7 +6,7 @@
 
 header {* Meta-theory of propositional logic *}
 
-theory PropLog = Main:
+theory PropLog imports Main begin
 
 text {*
   Datatype definition of propositional logic formulae and inductive