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src/HOL/Data_Structures/RBT_Map.thy
changeset 61790 0494964bb226
parent 61749 7f530d7e552d
child 63411 e051eea34990 
--- a/src/HOL/Data_Structures/RBT_Map.thy	Sat Dec 05 16:13:28 2015 +0100
+++ b/src/HOL/Data_Structures/RBT_Map.thy	Sat Dec 05 16:33:20 2015 +0100
@@ -70,7 +70,7 @@
 proof (standard, goal_cases)
   case 1 show ?case by simp
 next
-  case 2 thus ?case by(simp add: lookup_eq)
+  case 2 thus ?case by(simp add: lookup_map_of)
 next
   case 3 thus ?case by(simp add: inorder_update)
 next
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