arithmetics for λδ

[helm.git] / matita / matita / contribs / lambdadelta / ground / arith / nat.ma

diff --git a/matita/matita/contribs/lambdadelta/ground/arith/nat.ma b/matita/matita/contribs/lambdadelta/ground/arith/nat.ma
index 80a2aa200e64500e4c5a3b1f039a1832e434a748..d80d24f83057e852cd4ef54763e5cc95fb7dd693 100644 (file)
--- a/matita/matita/contribs/lambdadelta/ground/arith/nat.ma
+++ b/matita/matita/contribs/lambdadelta/ground/arith/nat.ma
@@ -38,6 +38,7 @@ qed-.
 
 (* Basic constructions ******************************************************)
 
+(*** eq_nat_dec *)
 lemma eq_nat_dec (n1,n2:nat): Decidable (n1 = n2).
 * [| #p1 ] * [2,4: #p2 ]
 [1,4: @or_intror #H destruct