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src/HOL/ZF/HOLZF.thy
changeset 33057 764547b68538
parent 32989 c28279b29ff1
child 35416 d8d7d1b785af 
--- a/src/HOL/ZF/HOLZF.thy	Wed Oct 21 17:34:35 2009 +0200
+++ b/src/HOL/ZF/HOLZF.thy	Thu Oct 22 09:27:48 2009 +0200
@@ -626,7 +626,7 @@
 
 lemma nat2Nat_Nat2nat[simp]: "Elem n Nat \<Longrightarrow> nat2Nat (Nat2nat n) = n"
   apply (simp add: Nat2nat_def)
-  apply (rule_tac f_inv_onto_f)
+  apply (rule_tac f_inv_into_f)
   apply (auto simp add: image_def Nat_def Sep)
   done
isabelle