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