src/HOL/Library/Extended_Nat.thy
changeset 58881 b9556a055632
parent 58306 117ba6cbe414
child 59000 6eb0725503fc
--- a/src/HOL/Library/Extended_Nat.thy	Sun Nov 02 17:16:01 2014 +0100
+++ b/src/HOL/Library/Extended_Nat.thy	Sun Nov 02 17:20:45 2014 +0100
@@ -3,7 +3,7 @@
     Contributions: David Trachtenherz, TU Muenchen
 *)
 
-header {* Extended natural numbers (i.e. with infinity) *}
+section {* Extended natural numbers (i.e. with infinity) *}
 
 theory Extended_Nat
 imports Main Countable