X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2Fbasic_2%2Funfold%2Fdelift.ma;h=e8ac23dae92a790cc0e89b95b997015bda8d41b4;hb=53f874fba5b9c39a788085515a4fefe5d29281da;hp=1af082f28d31b178a9a7156d6f22353552e16dfb;hpb=a2144f09d1bd7022c1f2dfd4909a1fb9772c8d56;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/basic_2/unfold/delift.ma b/matita/matita/contribs/lambda_delta/basic_2/unfold/delift.ma
index 1af082f28..e8ac23dae 100644
--- a/matita/matita/contribs/lambda_delta/basic_2/unfold/delift.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/unfold/delift.ma
@@ -102,7 +102,7 @@ qed-.
 
 (* Basic forward lemmas *****************************************************)
 
-lemma delift_fwd_tw: ∀L,T1,T2,d,e. L ⊢ ▼*[d, e] T1 ≡ T2 → #[T1] ≤ #[T2].
+lemma delift_fwd_tw: ∀L,T1,T2,d,e. L ⊢ ▼*[d, e] T1 ≡ T2 → #{T1} ≤ #{T2}.
 #L #T1 #T2 #d #e * #T #HT1 #HT2
 >(tw_lift … HT2) -T2 /2 width=4 by tpss_fwd_tw /
 qed-.