1.1 --- a/src/HOL/Hahn_Banach/Hahn_Banach.thy	Sun Nov 02 18:21:14 2014 +0100
     1.2 +++ b/src/HOL/Hahn_Banach/Hahn_Banach.thy	Sun Nov 02 18:21:45 2014 +0100
     1.3 @@ -2,7 +2,7 @@
     1.4      Author:     Gertrud Bauer, TU Munich
     1.5  *)
     1.6  
     1.7 -header \<open>The Hahn-Banach Theorem\<close>
     1.8 +section \<open>The Hahn-Banach Theorem\<close>
     1.9  
    1.10  theory Hahn_Banach
    1.11  imports Hahn_Banach_Lemmas