update in basic_2 and ground_2

[helm.git] / matita / matita / contribs / lambdadelta / ground_2 / ynat / ynat_pred.ma

diff --git a/matita/matita/contribs/lambdadelta/ground_2/ynat/ynat_pred.ma b/matita/matita/contribs/lambdadelta/ground_2/ynat/ynat_pred.ma
index b49dbda04a708baf00d037c358a331d0c8a1f352..b64e388773f454ea8e13fc3b7bf131625c323c3f 100644 (file)
--- a/matita/matita/contribs/lambdadelta/ground_2/ynat/ynat_pred.ma
+++ b/matita/matita/contribs/lambdadelta/ground_2/ynat/ynat_pred.ma
@@ -37,5 +37,5 @@ lemma ypred_Y: (↓∞) = ∞.
 
 lemma ypred_inv_refl: ∀m:ynat. ↓m = m → m = 0 ∨ m = ∞.
 * // #m #H lapply (yinj_inj … H) -H (**) (* destruct lemma needed *)
-/4 width=1 by pred_inv_refl, or_introl, eq_f/
+/4 width=1 by pred_inv_fix_sn, or_introl, eq_f/
 qed-.