diff -r e2c0d8ef29cb -r c399ae4b836f src/ZF/UNITY/Monotonicity.thy
--- a/src/ZF/UNITY/Monotonicity.thy	Sun Nov 02 16:09:35 2014 +0100
+++ b/src/ZF/UNITY/Monotonicity.thy	Sun Nov 02 16:39:54 2014 +0100
@@ -6,7 +6,7 @@
 set relations.
 *)
 
-header{*Monotonicity of an Operator WRT a Relation*}
+section{*Monotonicity of an Operator WRT a Relation*}
 
 theory Monotonicity imports GenPrefix MultisetSum
 begin