src/ZF/Cardinal_AC.thy

--- a/src/ZF/Cardinal_AC.thy	Fri Jun 17 11:35:35 2005 +0200
+++ b/src/ZF/Cardinal_AC.thy	Fri Jun 17 16:12:49 2005 +0200
@@ -8,7 +8,7 @@
 
 header{*Cardinal Arithmetic Using AC*}
 
-theory Cardinal_AC = CardinalArith + Zorn:
+theory Cardinal_AC imports CardinalArith Zorn begin
 
 subsection{*Strengthened Forms of Existing Theorems on Cardinals*}