--- a/src/ZF/ex/Ramsey.thy Fri Jun 17 11:35:35 2005 +0200
+++ b/src/ZF/ex/Ramsey.thy Fri Jun 17 16:12:49 2005 +0200
@@ -26,7 +26,7 @@
*)
-theory Ramsey = Main:
+theory Ramsey imports Main begin
constdefs
Symmetric :: "i=>o"
"Symmetric(E) == (\<forall>x y. <x,y>:E --> <y,x>:E)"