X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fmultiple%2Ffqus.ma;h=048dbf5ad20a08401ab5ddbe66460bc3bad1f195;hb=106b25f0206beedc4e416d223accb1308ca7161b;hp=6c990cace2e5fcc701ced6c44e21abc1f3bd5970;hpb=52e675f555f559c047d5449db7fc89a51b977d35;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/multiple/fqus.ma b/matita/matita/contribs/lambdadelta/basic_2/multiple/fqus.ma
index 6c990cace..048dbf5ad 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/multiple/fqus.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/multiple/fqus.ma
@@ -56,7 +56,7 @@ lemma fqus_strap2: ∀G1,G,G2,L1,L,L2,T1,T,T2. ⦃G1, L1, T1⦄ ⊐⸮ ⦃G, L,
 /2 width=5 by tri_TC_strap/ qed-.
 
 lemma fqus_drop: ∀G1,G2,K1,K2,T1,T2. ⦃G1, K1, T1⦄ ⊐* ⦃G2, K2, T2⦄ →
-                  ∀L1,U1,e. ⇩[e] L1 ≡ K1 → ⇧[0, e] T1 ≡ U1 →
+                  ∀L1,U1,e. ⬇[e] L1 ≡ K1 → ⬆[0, e] T1 ≡ U1 →
                   ⦃G1, L1, U1⦄ ⊐* ⦃G2, K2, T2⦄.
 #G1 #G2 #K1 #K2 #T1 #T2 #H @(fqus_ind … H) -G2 -K2 -T2
 /3 width=5 by fqus_strap1, fquq_fqus, fquq_drop/