X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fi_static%2Frexs_drops.ma;h=7ff2b3bad713083268eebec6f70ed0e6063198ae;hp=e146211fd9826b4c1a5e5730284f5659ce577db2;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

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 e146211fd..7ff2b3bad 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
@@ -24,13 +24,13 @@ definition tc_f_dedropable_sn: predicate (relation3 lenv term term) ≝
                                ∃∃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⦄ →
+                             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 →
+                             ∀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 *******************)