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src/HOL/Library/AList.thy
changeset 74157 8e2355ddce1b
parent 73832 9db620f007fa 
--- a/src/HOL/Library/AList.thy	Wed Aug 18 23:04:58 2021 +0200
+++ b/src/HOL/Library/AList.thy	Thu Aug 19 12:31:06 2021 +0200
@@ -424,7 +424,7 @@
 qed
 
 lemma graph_map_of: "Map.graph (map_of al) = set (clearjunk al)"
-  by (metis distinct_clearjunk graph_map_of_if_distinct_ran map_of_clearjunk)
+  by (metis distinct_clearjunk graph_map_of_if_distinct_dom map_of_clearjunk)
 
 lemma clearjunk_update: "clearjunk (update k v al) = update k v (clearjunk al)"
   by (induct al rule: clearjunk.induct) (simp_all add: delete_update)
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