--- a/src/HOL/Probability/Sigma_Algebra.thy Mon Nov 09 16:06:08 2009 +0000 +++ b/src/HOL/Probability/Sigma_Algebra.thy Mon Nov 09 19:42:33 2009 +0100 @@ -235,4 +235,3 @@ by (simp add: sigma_def sigma_sets_subset) end -