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src/HOL/Bali/DefiniteAssignmentCorrect.thy
changeset 32693 6c6b1ba5e71e
parent 26933 7ca61b1ad872
child 32960 69916a850301 
--- a/src/HOL/Bali/DefiniteAssignmentCorrect.thy	Mon Sep 21 15:35:14 2009 +0200
+++ b/src/HOL/Bali/DefiniteAssignmentCorrect.thy	Mon Sep 21 15:35:15 2009 +0200
@@ -1747,7 +1747,7 @@
       have "assigns (In1l e2) \<subseteq> dom (locals (store s2))"
 	by (simp add: need_second_arg_def)
       with s2
-      show ?thesis using False by (simp add: Un_subset_iff)
+      show ?thesis using False by simp
     qed
   next
     case Super thus ?case by simp
isabelle