X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Frelocation%2Fdrops_lex.ma;h=1201b75fad73f3510fc4ba781a6ce75cdfc24ef0;hp=97a95c63852675acc20b33516bbe6e2be3fc4478;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

diff --git a/matita/matita/contribs/lambdadelta/static_2/relocation/drops_lex.ma b/matita/matita/contribs/lambdadelta/static_2/relocation/drops_lex.ma
index 97a95c638..1201b75fa 100644
--- a/matita/matita/contribs/lambdadelta/static_2/relocation/drops_lex.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/relocation/drops_lex.ma
@@ -23,11 +23,11 @@ definition dedropable_sn: predicate … ≝
                           ∃∃L2. L1 ⪤[R] L2 & ⇩*[b,f] L2 ≘ K2 & L1 ≡[f] L2.
 
 definition dropable_sn: predicate … ≝
-                        λR. ∀b,f,L1,K1. ⇩*[b,f] L1 ≘ K1 → 𝐔⦃f⦄ → ∀L2. L1 ⪤[R] L2 →
+                        λR. ∀b,f,L1,K1. ⇩*[b,f] L1 ≘ K1 → 𝐔❪f❫ → ∀L2. L1 ⪤[R] L2 →
                         ∃∃K2. K1 ⪤[R] K2 & ⇩*[b,f] L2 ≘ K2.
 
 definition dropable_dx: predicate … ≝
-                        λR. ∀L1,L2. L1 ⪤[R] L2 → ∀b,f,K2. ⇩*[b,f] L2 ≘ K2 → 𝐔⦃f⦄ →
+                        λR. ∀L1,L2. L1 ⪤[R] L2 → ∀b,f,K2. ⇩*[b,f] L2 ≘ K2 → 𝐔❪f❫ →
                         ∃∃K1. ⇩*[b,f] L1 ≘ K1 & K1 ⪤[R] K2.
 
 (* Properties with generic extension ****************************************)
@@ -58,8 +58,8 @@ qed-.
 
 (* Basic_2A1: includes: lpx_sn_drop_conf *)
 lemma lex_drops_conf_pair (R): ∀L1,L2. L1 ⪤[R] L2 →
-                               ∀b,f,I,K1,V1. ⇩*[b,f] L1 ≘ K1.ⓑ{I}V1 → 𝐔⦃f⦄ →
-                               ∃∃K2,V2. ⇩*[b,f] L2 ≘ K2.ⓑ{I}V2 & K1 ⪤[R] K2 & R K1 V1 V2.
+                               ∀b,f,I,K1,V1. ⇩*[b,f] L1 ≘ K1.ⓑ[I]V1 → 𝐔❪f❫ →
+                               ∃∃K2,V2. ⇩*[b,f] L2 ≘ K2.ⓑ[I]V2 & K1 ⪤[R] K2 & R K1 V1 V2.
 #R #L1 #L2 * #f2 #Hf2 #HL12 #b #f #I #K1 #V1 #HLK1 #Hf
 elim (sex_drops_conf_push … HL12 … HLK1 Hf f2) -L1 -Hf
 [ #Z2 #K2 #HLK2 #HK12 #H
@@ -71,8 +71,8 @@ qed-.
 
 (* Basic_2A1: includes: lpx_sn_drop_trans *)
 lemma lex_drops_trans_pair (R): ∀L1,L2. L1 ⪤[R] L2 →
-                                ∀b,f,I,K2,V2. ⇩*[b,f] L2 ≘ K2.ⓑ{I}V2 → 𝐔⦃f⦄ →
-                                ∃∃K1,V1. ⇩*[b,f] L1 ≘ K1.ⓑ{I}V1 & K1 ⪤[R] K2 & R K1 V1 V2.
+                                ∀b,f,I,K2,V2. ⇩*[b,f] L2 ≘ K2.ⓑ[I]V2 → 𝐔❪f❫ →
+                                ∃∃K1,V1. ⇩*[b,f] L1 ≘ K1.ⓑ[I]V1 & K1 ⪤[R] K2 & R K1 V1 V2.
 #R #L1 #L2 * #f2 #Hf2 #HL12 #b #f #I #K2 #V2 #HLK2 #Hf
 elim (sex_drops_trans_push … HL12 … HLK2 Hf f2) -L2 -Hf
 [ #Z1 #K1 #HLK1 #HK12 #H