X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Fcsx_reqx.ma;h=a32c9380e6062a7af024fdd12867738fdc7c8bb1;hp=7b3cfdae381b3de0ce427558d0a9b3da38c7bf53;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_reqx.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_reqx.ma
index 7b3cfdae3..a32c9380e 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_reqx.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/csx_reqx.ma
@@ -20,8 +20,8 @@ include "basic_2/rt_computation/csx_csx.ma".
 (* Properties with sort-irrelevant equivalence for local environments *******)
 
 (* Basic_2A1: uses: csx_lleq_conf *)
-lemma csx_reqx_conf: ∀h,G,L1,T. ⦃G,L1⦄ ⊢ ⬈*[h] 𝐒⦃T⦄ →
-                     ∀L2. L1 ≛[T] L2 → ⦃G,L2⦄ ⊢ ⬈*[h] 𝐒⦃T⦄.
+lemma csx_reqx_conf: ∀h,G,L1,T. ❪G,L1❫ ⊢ ⬈*[h] 𝐒❪T❫ →
+                     ∀L2. L1 ≛[T] L2 → ❪G,L2❫ ⊢ ⬈*[h] 𝐒❪T❫.
 #h #G #L1 #T #H
 @(csx_ind … H) -T #T1 #_ #IH #L2 #HL12
 @csx_intro #T2 #HT12 #HnT12
@@ -31,5 +31,5 @@ qed-.
 
 (* Basic_2A1: uses: csx_lleq_conf *)
 lemma csx_reqx_trans: ∀h,L1,L2,T. L1 ≛[T] L2 →
-                      ∀G. ⦃G,L2⦄ ⊢ ⬈*[h] 𝐒⦃T⦄ → ⦃G,L1⦄ ⊢ ⬈*[h] 𝐒⦃T⦄.
+                      ∀G. ❪G,L2❫ ⊢ ⬈*[h] 𝐒❪T❫ → ❪G,L1❫ ⊢ ⬈*[h] 𝐒❪T❫.
 /3 width=3 by csx_reqx_conf, reqx_sym/ qed-.