X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Funfold%2Fdelift.ma;h=cde52912280c1f68471cf5aea095728ce69b5239;hb=fba384e357ed3c8781fc018c2c16f2b40df144af;hp=e8ac23dae92a790cc0e89b95b997015bda8d41b4;hpb=38c81062ae1aedf89d426d5dcd9a27824c4b0fb0;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/unfold/delift.ma b/matita/matita/contribs/lambdadelta/basic_2/unfold/delift.ma
index e8ac23dae..cde529122 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/unfold/delift.ma
+++ b/matita/matita/contribs/lambdadelta/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 /
+>(tw_lift … HT2) -T2 /2 width=4 by tpss_fwd_tw/
 qed-.