X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fnat%2Fnat.ma;h=c54b41c8d71e73262c949ea5043b6ddd2c4cc5d4;hb=85857e1832b921fdba61be9e7fbfc81da50f38f6;hp=85f598d129a434f7cad878dd9c8a2fc4fdc56077;hpb=c445ba5534cccde19016c92660ab52777af221c0;p=helm.git

diff --git a/helm/software/matita/library/nat/nat.ma b/helm/software/matita/library/nat/nat.ma
index 85f598d12..c54b41c8d 100644
--- a/helm/software/matita/library/nat/nat.ma
+++ b/helm/software/matita/library/nat/nat.ma
@@ -14,15 +14,12 @@
 
 include "higher_order_defs/functions.ma".
 
-theorem esempio: \forall A,B,C:Prop.(A \to B \to C) \to (A \to B)
-\to A \to C.
-
-
-
 inductive nat : Set \def
   | O : nat
   | S : nat \to nat.
 
+interpretation "Natural numbers" 'N = nat.
+
 definition pred: nat \to nat \def
  \lambda n:nat. match n with
  [ O \Rightarrow  O