X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Frpx_drops.ma;h=7b968540f503b5447d88bb10afec02d58fdd5418;hb=e0c91d8a4422da0b39aca790e5826dc8a617b303;hp=5e37a7213de391f62354f5ac231fc9e1c262ea9a;hpb=3c7b4071a9ac096b02334c1d47468776b948e2de;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/rpx_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/rpx_drops.ma
index 5e37a7213..7b968540f 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/rpx_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/rpx_drops.ma
@@ -32,7 +32,7 @@ lemma rpx_inv_lifts_dx (G): f_dropable_dx (cpx G).
 /2 width=5 by rex_dropable_dx/ qed-.
 
 lemma rpx_inv_lifts_bi (G):
-      ∀L1,L2,U. ❪G,L1❫ ⊢ ⬈[U] L2 → ∀b,f. 𝐔❪f❫ →
+      ∀L1,L2,U. ❨G,L1❩ ⊢ ⬈[U] L2 → ∀b,f. 𝐔❨f❩ →
       ∀K1,K2. ⇩*[b,f] L1 ≘ K1 → ⇩*[b,f] L2 ≘ K2 →
-      ∀T. ⇧*[f]T ≘ U → ❪G,K1❫ ⊢ ⬈[T] K2.
+      ∀T. ⇧*[f]T ≘ U → ❨G,K1❩ ⊢ ⬈[T] K2.
 /2 width=10 by rex_inv_lifts_bi/ qed-.