src/HOL/Library/Dlist.thy
changeset 45694 4a8743618257
parent 43764 366d5726de09
child 45927 e0305e4f02c9
     1.1 --- a/src/HOL/Library/Dlist.thy	Wed Nov 30 16:05:15 2011 +0100
     1.2 +++ b/src/HOL/Library/Dlist.thy	Wed Nov 30 16:27:10 2011 +0100
     1.3 @@ -11,7 +11,7 @@
     1.4  typedef (open) 'a dlist = "{xs::'a list. distinct xs}"
     1.5    morphisms list_of_dlist Abs_dlist
     1.6  proof
     1.7 -  show "[] \<in> ?dlist" by simp
     1.8 +  show "[] \<in> {xs. distinct xs}" by simp
     1.9  qed
    1.10  
    1.11  lemma dlist_eq_iff: