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src/HOL/Groups_Big.thy
changeset 58889 5b7a9633cfa8
parent 58437 8d124c73c37a
child 59010 ec2b4270a502 
--- a/src/HOL/Groups_Big.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Groups_Big.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -3,7 +3,7 @@
                 with contributions by Jeremy Avigad
 *)
 
-header {* Big sum and product over finite (non-empty) sets *}
+section {* Big sum and product over finite (non-empty) sets *}
 
 theory Groups_Big
 imports Finite_Set
isabelle