X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fstatic%2Flsuba_drops.ma;h=49040fe5e59000cfce42ab5ae4ad5d48440969cc;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hp=86d3a1bb90ecb2273ca3a32eb60723d71392ea74;hpb=f308429a0fde273605a2330efc63268b4ac36c99;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/static_2/static/lsuba_drops.ma b/matita/matita/contribs/lambdadelta/static_2/static/lsuba_drops.ma
index 86d3a1bb9..49040fe5e 100644
--- a/matita/matita/contribs/lambdadelta/static_2/static/lsuba_drops.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/static/lsuba_drops.ma
@@ -19,11 +19,11 @@ include "static_2/static/lsuba.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: lsuba_drop_O1_conf *)
-lemma lsuba_drops_conf_isuni: ∀G,L1,L2. G ⊢ L1 ⫃⁝ L2 → 
-                              ∀b,f,K1. 𝐔⦃f⦄ → ⬇*[b,f] L1 ≘ K1 →
-                              ∃∃K2. G ⊢ K1 ⫃⁝ K2 & ⬇*[b,f] L2 ≘ K2.
+lemma lsuba_drops_conf_isuni: ∀G,L1,L2. G ⊢ L1 ⫃⁝ L2 →
+                              ∀b,f,K1. 𝐔❪f❫ → ⇩*[b,f] L1 ≘ K1 →
+                              ∃∃K2. G ⊢ K1 ⫃⁝ K2 & ⇩*[b,f] L2 ≘ K2.
 #G #L1 #L2 #H elim H -L1 -L2
 [ /2 width=3 by ex2_intro/
 | #I #L1 #L2 #HL12 #IH #b #f #K1 #Hf #H
@@ -43,11 +43,11 @@ lemma lsuba_drops_conf_isuni: ∀G,L1,L2. G ⊢ L1 ⫃⁝ L2 →
 ]
 qed-.
 
-(* Note: the premise 𝐔⦃f⦄ cannot be removed *)
+(* Note: the premise 𝐔❪f❫ cannot be removed *)
 (* Basic_2A1: includes: lsuba_drop_O1_trans *)
 lemma lsuba_drops_trans_isuni: ∀G,L1,L2. G ⊢ L1 ⫃⁝ L2 →
-                               ∀b,f,K2. 𝐔⦃f⦄ → ⬇*[b,f] L2 ≘ K2 →
-                               ∃∃K1. G ⊢ K1 ⫃⁝ K2 & ⬇*[b,f] L1 ≘ K1.
+                               ∀b,f,K2. 𝐔❪f❫ → ⇩*[b,f] L2 ≘ K2 →
+                               ∃∃K1. G ⊢ K1 ⫃⁝ K2 & ⇩*[b,f] L1 ≘ K1.
 #G #L1 #L2 #H elim H -L1 -L2
 [ /2 width=3 by ex2_intro/
 | #I #L1 #L2 #HL12 #IH #b #f #K2 #Hf #H