--- a/src/HOL/Rings.thy Sun Nov 02 18:21:14 2014 +0100 +++ b/src/HOL/Rings.thy Sun Nov 02 18:21:45 2014 +0100 @@ -7,7 +7,7 @@ Author: Jeremy Avigad *) -header {* Rings *} +section {* Rings *} theory Rings imports Groups