X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fs_computation%2Ffqus_drops.ma;h=8216c86c050a5869469f8528789f5dc542af1c99;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hp=24ba92a09c499df96a40bc98178744e5ad180d94;hpb=5b5dca0c118dfbe3ba8f0514ef07549544eb7810;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma b/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma
index 24ba92a09..8216c86c0 100644
--- a/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma
@@ -19,8 +19,8 @@ include "static_2/s_computation/fqus_fqup.ma".
 
 (* Properties with generic slicing for local environments *******************)
 
-lemma fqus_drops: ∀b,G,L,K,T,U,i. ⬇*[i] L ≘ K → ⬆*[i] T ≘ U →
-                  ⦃G,L,U⦄ ⬂*[b] ⦃G,K,T⦄.
+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.