From eac90238cf23594c64e305d2945fd29ed075df0a Mon Sep 17 00:00:00 2001
From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Wed, 28 Jan 2009 17:55:20 +0000
Subject: [PATCH] ...

---
 helm/software/matita/library/nat/nat.ma | 1 +
 1 file changed, 1 insertion(+)

diff --git a/helm/software/matita/library/nat/nat.ma b/helm/software/matita/library/nat/nat.ma
index c54b41c8d..b098279e6 100644
--- a/helm/software/matita/library/nat/nat.ma
+++ b/helm/software/matita/library/nat/nat.ma
@@ -19,6 +19,7 @@ inductive nat : Set \def
   | S : nat \to nat.
 
 interpretation "Natural numbers" 'N = nat.
+alias num (instance 0) = "natural number".
 
 definition pred: nat \to nat \def
  \lambda n:nat. match n with
-- 
2.39.2