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src/HOL/UNITY/GenPrefix.thy
changeset 9382 7cea1cb9703e
parent 6824 8f7bfd81a4c6
child 12338 de0f4a63baa5 
--- a/src/HOL/UNITY/GenPrefix.thy	Tue Jul 18 13:16:48 2000 +0200
+++ b/src/HOL/UNITY/GenPrefix.thy	Tue Jul 18 14:52:30 2000 +0200
@@ -27,7 +27,7 @@
 
     append  "(xs,ys) : genPrefix(r) ==> (xs, ys@zs) : genPrefix(r)"
 
-arities list :: (term)ord
+instance list :: (term)ord
 
 defs
   prefix_def        "xs <= zs  ==  (xs,zs) : genPrefix Id"
isabelle