--- a/src/HOL/HOLCF/Library/Sum_Cpo.thy Sun Nov 02 17:14:15 2014 +0100
+++ b/src/HOL/HOLCF/Library/Sum_Cpo.thy Sun Nov 02 17:16:01 2014 +0100
@@ -2,7 +2,7 @@
Author: Brian Huffman
*)
-header {* The cpo of disjoint sums *}
+section {* The cpo of disjoint sums *}
theory Sum_Cpo
imports HOLCF