X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fi_static%2Frexs_drops.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fi_static%2Frexs_drops.ma;h=e146211fd9826b4c1a5e5730284f5659ce577db2;hb=67fe9cec87e129a2a41c75d7ed8456a6f3314421;hp=11025a4a19dccfeb741a85eb11892a1eb219adfa;hpb=86861e6f031df66824a381527dfe847029ff72bc;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/static_2/i_static/rexs_drops.ma b/matita/matita/contribs/lambdadelta/static_2/i_static/rexs_drops.ma
index 11025a4a1..e146211fd 100644
--- a/matita/matita/contribs/lambdadelta/static_2/i_static/rexs_drops.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/i_static/rexs_drops.ma
@@ -19,19 +19,19 @@ include "static_2/i_static/rexs.ma".
 (* ITERATED EXTENSION ON REFERRED ENTRIES OF A CONTEXT-SENSITIVE REALTION ***)
 
 definition tc_f_dedropable_sn: predicate (relation3 lenv term term) ≝
-                               λR. ∀b,f,L1,K1. ⬇*[b,f] L1 ≘ K1 →
-                               ∀K2,T. K1 ⪤*[R,T] K2 → ∀U. ⬆*[f] T ≘ U →
-                               ∃∃L2. L1 ⪤*[R,U] L2 & ⬇*[b,f] L2 ≘ K2 & L1 ≡[f] L2.
+                               λR. ∀b,f,L1,K1. ⇩*[b,f] L1 ≘ K1 →
+                               ∀K2,T. K1 ⪤*[R,T] K2 → ∀U. ⇧*[f] T ≘ U →
+                               ∃∃L2. L1 ⪤*[R,U] L2 & ⇩*[b,f] L2 ≘ K2 & L1 ≡[f] L2.
 
 definition tc_f_dropable_sn: predicate (relation3 lenv term term) ≝
-                             λR. ∀b,f,L1,K1. ⬇*[b,f] L1 ≘ K1 → 𝐔⦃f⦄ →
-                             ∀L2,U. L1 ⪤*[R,U] L2 → ∀T. ⬆*[f] T ≘ U →
-                             ∃∃K2. K1 ⪤*[R,T] K2 & ⬇*[b,f] L2 ≘ K2.
+                             λR. ∀b,f,L1,K1. ⇩*[b,f] L1 ≘ K1 → 𝐔⦃f⦄ →
+                             ∀L2,U. L1 ⪤*[R,U] L2 → ∀T. ⇧*[f] T ≘ U →
+                             ∃∃K2. K1 ⪤*[R,T] K2 & ⇩*[b,f] L2 ≘ K2.
 
 definition tc_f_dropable_dx: predicate (relation3 lenv term term) ≝
                              λR. ∀L1,L2,U. L1 ⪤*[R,U] L2 →
-                             ∀b,f,K2. ⬇*[b,f] L2 ≘ K2 → 𝐔⦃f⦄ → ∀T. ⬆*[f] T ≘ U →
-                             ∃∃K1. ⬇*[b,f] L1 ≘ K1 & K1 ⪤*[R,T] K2.
+                             ∀b,f,K2. ⇩*[b,f] L2 ≘ K2 → 𝐔⦃f⦄ → ∀T. ⇧*[f] T ≘ U →
+                             ∃∃K1. ⇩*[b,f] L1 ≘ K1 & K1 ⪤*[R,T] K2.
 
 (* Properties with generic slicing for local environments *******************)