1.1 --- a/src/HOL/Codatatype/BNF_FP.thy Sat Sep 15 20:14:29 2012 +0200
1.2 +++ b/src/HOL/Codatatype/BNF_FP.thy Sat Sep 15 21:10:26 2012 +0200
1.3 @@ -104,10 +104,8 @@
1.4 "sum_case f g (if p then Inl x else Inr y) = (if p then f x else g y)"
1.5 by simp
1.6
1.7 -(* TODO: cleanup *)
1.8 lemma UN_compreh_bex:
1.9 "\<Union>{y. \<exists>x \<in> A. y = {}} = {}"
1.10 -"\<Union>{y. \<exists>x \<in> A. y = {x}} = A"
1.11 "\<Union>{y. \<exists>x \<in> A. y = {f x}} = {y. \<exists>x \<in> A. y = f x}"
1.12 by blast+
1.13