--- a/src/HOL/SET_Protocol/Purchase.thy Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/SET_Protocol/Purchase.thy Sun Nov 02 18:21:45 2014 +0100
@@ -4,7 +4,7 @@
Author: Lawrence C Paulson
*)
-header{*Purchase Phase of SET*}
+section{*Purchase Phase of SET*}
theory Purchase
imports Public_SET