src/HOL/Limits.thy
changeset 49834 b27bbb021df1
parent 47432 e1576d13e933
child 50247 491c5c81c2e8
     1.1 --- a/src/HOL/Limits.thy	Fri Oct 12 15:08:29 2012 +0200
     1.2 +++ b/src/HOL/Limits.thy	Fri Oct 12 18:58:20 2012 +0200
     1.3 @@ -20,7 +20,7 @@
     1.4    assumes conj: "F (\<lambda>x. P x) \<Longrightarrow> F (\<lambda>x. Q x) \<Longrightarrow> F (\<lambda>x. P x \<and> Q x)"
     1.5    assumes mono: "\<forall>x. P x \<longrightarrow> Q x \<Longrightarrow> F (\<lambda>x. P x) \<Longrightarrow> F (\<lambda>x. Q x)"
     1.6  
     1.7 -typedef (open) 'a filter = "{F :: ('a \<Rightarrow> bool) \<Rightarrow> bool. is_filter F}"
     1.8 +typedef 'a filter = "{F :: ('a \<Rightarrow> bool) \<Rightarrow> bool. is_filter F}"
     1.9  proof
    1.10    show "(\<lambda>x. True) \<in> ?filter" by (auto intro: is_filter.intro)
    1.11  qed