X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fdynamic%2Flsubv_drops.ma;h=ac7e5430e45ec273188e42596a373a7b2a68f75c;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hp=6b0daf223665780c6e1cf4516219e732a8da1296;hpb=db020b4218272e2e35641ce3bc3b0a9b3afda899;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubv_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubv_drops.ma
index 6b0daf223..ac7e5430e 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubv_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubv_drops.ma
@@ -19,12 +19,12 @@ include "basic_2/dynamic/lsubv.ma".
 
 (* Properties with generic slicing for local environments *******************)
 
-(* Note: the premise 𝐔⦃f⦄ cannot be removed *)
+(* Note: the premise 𝐔❪f❫ cannot be removed *)
 (* Basic_2A1: includes: lsubsv_drop_O1_conf *)
 lemma lsubv_drops_conf_isuni (h) (a) (G):
       ∀L1,L2. G ⊢ L1 ⫃![h,a] L2 →
-      ∀b,f,K1. 𝐔⦃f⦄ → ⬇*[b,f] L1 ≘ K1 →
-      ∃∃K2. G ⊢ K1 ⫃![h,a] K2 & ⬇*[b,f] L2 ≘ K2.
+      ∀b,f,K1. 𝐔❪f❫ → ⇩*[b,f] L1 ≘ K1 →
+      ∃∃K2. G ⊢ K1 ⫃![h,a] K2 & ⇩*[b,f] L2 ≘ K2.
 #h #a #G #L1 #L2 #H elim H -L1 -L2
 [ /2 width=3 by ex2_intro/
 | #I #L1 #L2 #HL12 #IH #b #f #K1 #Hf #H
@@ -44,12 +44,12 @@ lemma lsubv_drops_conf_isuni (h) (a) (G):
 ]
 qed-.
 
-(* Note: the premise 𝐔⦃f⦄ cannot be removed *)
+(* Note: the premise 𝐔❪f❫ cannot be removed *)
 (* Basic_2A1: includes: lsubsv_drop_O1_trans *)
 lemma lsubv_drops_trans_isuni (h) (a) (G):
       ∀L1,L2. G ⊢ L1 ⫃![h,a] L2 →
-      ∀b,f,K2. 𝐔⦃f⦄ → ⬇*[b,f] L2 ≘ K2 →
-      ∃∃K1. G ⊢ K1 ⫃![h,a] K2 & ⬇*[b,f] L1 ≘ K1.
+      ∀b,f,K2. 𝐔❪f❫ → ⇩*[b,f] L2 ≘ K2 →
+      ∃∃K1. G ⊢ K1 ⫃![h,a] K2 & ⇩*[b,f] L1 ≘ K1.
 #h #a #G #L1 #L2 #H elim H -L1 -L2
 [ /2 width=3 by ex2_intro/
 | #I #L1 #L2 #HL12 #IH #b #f #K2 #Hf #H