X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fs_computation%2Ffqus_drops.ma;h=a1adcfcf53e93cc62b86d44d24e43c46db6fe20c;hb=98fbba1b68d457807c73ebf70eb2a48696381da4;hp=8850c1f54865d6c42e832546dff9d19483ec4891;hpb=65e6209e0758832835ba8d14304a1548d059a634;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqus_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqus_drops.ma
index 8850c1f54..a1adcfcf5 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqus_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqus_drops.ma
@@ -19,8 +19,8 @@ include "basic_2/s_computation/fqus_fqup.ma".
 
 (* Properties with generic slicing for local environments *******************)
 
-lemma fqus_drops: ∀G,L,K,T,U,l. ⬇*[l] L ≡ K → ⬆*[l] T ≡ U →
-                  ⦃G, L, U⦄ ⊐* ⦃G, K, T⦄.
-#G #L #K #T #U * /3 width=3 by fqup_drops_succ, fqup_fqus/
+lemma fqus_drops: ∀b,G,L,K,T,U,i. ⬇*[i] L ≡ K → ⬆*[i] T ≡ U →
+                  ⦃G, L, U⦄ ⊐*[b] ⦃G, K, T⦄.
+#b #G #L #K #T #U * /3 width=3 by fqup_drops_succ, fqup_fqus/
 #HLK #HTU <(lifts_fwd_isid … HTU) -U // <(drops_fwd_isid … HLK) -K //
 qed.