X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fnat%2Fnat.ma;h=83b489f06eb08a6772e0d7abb00e315032604ad0;hb=647b419e96770d90a82d7a9e5e8843566a9f93ee;hp=5e3e769ec11cf8778db2aa4d43986c5544b23d7e;hpb=4dc47c9675ffd5fa50296ffaa9b5997501518c98;p=helm.git

diff --git a/helm/software/matita/library/nat/nat.ma b/helm/software/matita/library/nat/nat.ma
index 5e3e769ec..83b489f06 100644
--- a/helm/software/matita/library/nat/nat.ma
+++ b/helm/software/matita/library/nat/nat.ma
@@ -19,6 +19,9 @@ inductive nat : Set \def
   | S : nat \to nat.
 
 interpretation "Natural numbers" 'N = nat.
+
+default "natural numbers" cic:/matita/nat/nat/nat.ind.
+
 alias num (instance 0) = "natural number".
 
 definition pred: nat \to nat \def