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src/HOL/Transitive_Closure.thy
changeset 44921 58eef4843641
parent 44890 22f665a2e91c
child 45116 f947eeef6b6f 
--- a/src/HOL/Transitive_Closure.thy	Tue Sep 13 08:21:51 2011 -0700
+++ b/src/HOL/Transitive_Closure.thy	Tue Sep 13 17:07:33 2011 -0700
@@ -220,7 +220,7 @@
   apply (rename_tac a b)
   apply (case_tac "a = b")
    apply blast
-  apply (blast intro!: r_into_rtrancl)
+  apply blast
   done
 
 lemma rtranclp_r_diff_Id: "(inf r op ~=)^** = r^**"
isabelle