X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Frsx_drops.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Frsx_drops.ma;h=15c7d4dfb45b2e01df3999ccee5d1fe195e39963;hb=67fe9cec87e129a2a41c75d7ed8456a6f3314421;hp=64ebcd6669b08b2a5f4dda0c539bbf47b367ff85;hpb=86861e6f031df66824a381527dfe847029ff72bc;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/rsx_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/rsx_drops.ma
index 64ebcd666..15c7d4dfb 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/rsx_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/rsx_drops.ma
@@ -43,13 +43,13 @@ qed-.
 (* Advanced properties ******************************************************)
 
 (* Basic_2A1: uses: lsx_lref_free *)
-lemma rsx_lref_atom_drops (h) (G): ∀L,i. ⬇*[Ⓕ,𝐔❴i❵] L ≘ ⋆ → G ⊢ ⬈*[h,#i] 𝐒⦃L⦄.
+lemma rsx_lref_atom_drops (h) (G): ∀L,i. ⇩*[Ⓕ,𝐔❴i❵] L ≘ ⋆ → G ⊢ ⬈*[h,#i] 𝐒⦃L⦄.
 #h #G #L1 #i #HL1
 @(rsx_lifts … (#0) … HL1) -HL1 //
 qed.
 
 (* Basic_2A1: uses: lsx_lref_skip *)
-lemma rsx_lref_unit_drops (h) (G): ∀I,L,K,i. ⬇*[i] L ≘ K.ⓤ{I} → G ⊢ ⬈*[h,#i] 𝐒⦃L⦄.
+lemma rsx_lref_unit_drops (h) (G): ∀I,L,K,i. ⇩*[i] L ≘ K.ⓤ{I} → G ⊢ ⬈*[h,#i] 𝐒⦃L⦄.
 #h #G #I #L1 #K1 #i #HL1
 @(rsx_lifts … (#0) … HL1) -HL1 //
 qed.
@@ -59,7 +59,7 @@ qed.
 (* Basic_2A1: uses: lsx_fwd_lref_be *)
 lemma rsx_fwd_lref_pair_drops (h) (G):
       ∀L,i. G ⊢ ⬈*[h,#i] 𝐒⦃L⦄ →
-      ∀I,K,V. ⬇*[i] L ≘ K.ⓑ{I}V → G ⊢ ⬈*[h,V] 𝐒⦃K⦄.
+      ∀I,K,V. ⇩*[i] L ≘ K.ⓑ{I}V → G ⊢ ⬈*[h,V] 𝐒⦃K⦄.
 #h #G #L #i #HL #I #K #V #HLK
 lapply (rsx_inv_lifts … HL … HLK … (#0) ?) -L
 /2 width=2 by rsx_fwd_pair/