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src/HOL/Library/EfficientNat.thy
changeset 21404 eb85850d3eb7
parent 21287 a713ae348e8a
child 21454 a1937c51ed88 
--- a/src/HOL/Library/EfficientNat.thy	Fri Nov 17 02:19:55 2006 +0100
+++ b/src/HOL/Library/EfficientNat.thy	Fri Nov 17 02:20:03 2006 +0100
@@ -25,7 +25,7 @@
 *}
 
 definition
-  nat_of_int :: "int \<Rightarrow> nat"
+  nat_of_int :: "int \<Rightarrow> nat" where
   "k \<ge> 0 \<Longrightarrow> nat_of_int k = nat k"
 
 lemma nat_of_int_int:
isabelle