arithmetics for λδ

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

diff --git a/matita/matita/contribs/lambdadelta/ground/arith/nat_lt_pred.ma b/matita/matita/contribs/lambdadelta/ground/arith/nat_lt_pred.ma
index 7ebc811f88a988ed8409504f4f4bd7f1be73184e..c319006fc4df70d9fadeffe0e3ed266d1b823f8d 100644 (file)
--- a/matita/matita/contribs/lambdadelta/ground/arith/nat_lt_pred.ma
+++ b/matita/matita/contribs/lambdadelta/ground/arith/nat_lt_pred.ma
@@ -26,7 +26,7 @@ lemma nlt_zero_sn (m): m = ↑↓m → 𝟎 < m.
 
 (*** S_pred *)
 lemma nlt_inv_zero_sn (m): 𝟎 < m → m = ↑↓m.
-#m @(nat_ind … m) -m //
+#m @(nat_ind_succ … m) -m //
 #H elim (nlt_inv_refl … H)
 qed-.