diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/HOL/Cardinals/Cardinal_Order_Relation.thy
--- a/src/HOL/Cardinals/Cardinal_Order_Relation.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Cardinals/Cardinal_Order_Relation.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -5,7 +5,7 @@
 Cardinal-order relations.
 *)
 
-header {* Cardinal-Order Relations *}
+section {* Cardinal-Order Relations *}
 
 theory Cardinal_Order_Relation
 imports BNF_Cardinal_Order_Relation Wellorder_Constructions