Few theorems added.`

[helm.git] / matita / library / nat / nat.ma

diff --git a/matita/library/nat/nat.ma b/matita/library/nat/nat.ma
index b600072c61ba97cfa9e862251d04c566b3a0e765..b54bc76a9b4b416e80a35d5bb01b48fea9b70f5c 100644 (file)
--- a/matita/library/nat/nat.ma
+++ b/matita/library/nat/nat.ma
@@ -26,7 +26,7 @@ definition pred: nat \to nat \def
  | (S p) \Rightarrow p ].
 
 theorem pred_Sn : \forall n:nat.n=(pred (S n)).
- intros. reflexivity.
+ intros. simplify. reflexivity.
 qed.
 
 theorem injective_S : injective nat nat S.