X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fdynamic%2Fnta_fsb.ma;h=f3ae362566b35a48cf9ae0bdbcb1fc643ea4916e;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hp=4d4cebd5e13074829a5af9ae5050cb82da6c31f3;hpb=c7b50fec51b9a25d5bc536f44e54179fd53efb44;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_fsb.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_fsb.ma
index 4d4cebd5e..f3ae36256 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_fsb.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_fsb.ma
@@ -24,8 +24,8 @@ include "basic_2/dynamic/nta.ma".
 (* Basic_1: uses: ty3_sn3 *)
 (* Basic_2A1: uses: nta_fwd_csn *)
 theorem nta_fwd_fsb (h) (a) (G) (L):
-        ∀T,U. ⦃G,L⦄ ⊢ T :[h,a] U →
-        ∧∧ ≥[h] 𝐒⦃G,L,T⦄ & ≥[h] 𝐒⦃G,L,U⦄.
+        ∀T,U. ❪G,L❫ ⊢ T :[h,a] U →
+        ∧∧ ≥[h] 𝐒❪G,L,T❫ & ≥[h] 𝐒❪G,L,U❫.
 #h #a #G #L #T #U #H
 elim (cnv_inv_cast … H) #X #HU #HT #_ #_ -X
 /3 width=2 by cnv_fwd_fsb, conj/