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src/HOL/Transitive_Closure.thy
changeset 77695 93531ba2c784
parent 76751 66f17783913b
child 79611 97612262718a 
--- a/src/HOL/Transitive_Closure.thy	Mon Mar 20 11:13:01 2023 +0100
+++ b/src/HOL/Transitive_Closure.thy	Mon Mar 20 15:01:12 2023 +0100
@@ -6,7 +6,7 @@
 section \<open>Reflexive and Transitive closure of a relation\<close>
 
 theory Transitive_Closure
-  imports Relation
+  imports Finite_Set
   abbrevs "^*" = "\<^sup>*" "\<^sup>*\<^sup>*"
     and "^+" = "\<^sup>+" "\<^sup>+\<^sup>+"
     and "^=" = "\<^sup>=" "\<^sup>=\<^sup>="
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