--- a/src/HOL/Old_Number_Theory/Gauss.thy Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Old_Number_Theory/Gauss.thy Sun Nov 02 18:21:45 2014 +0100
@@ -2,7 +2,7 @@
Authors: Jeremy Avigad, David Gray, and Adam Kramer
*)
-header {* Gauss' Lemma *}
+section {* Gauss' Lemma *}
theory Gauss
imports Euler