X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Fcprs_cnr.ma;h=45cad66b7b0c4b415c37884aff40979714c04c25;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hp=8cbb2ee6febdead95a44b9d118b5ad5dbbb825f8;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_cnr.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_cnr.ma
index 8cbb2ee6f..45cad66b7 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_cnr.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/cprs_cnr.ma
@@ -22,7 +22,7 @@ include "basic_2/rt_computation/cprs.ma".
 (* Basic_1: was: nf2_pr3_unfold *)
 (* Basic_2A1: was: cprs_inv_cnr1 *)
 lemma cprs_inv_cnr_sn (h) (G) (L):
-      ∀T1,T2. ⦃G,L⦄ ⊢ T1 ➡*[h] T2 → ⦃G,L⦄ ⊢ ➡[h] 𝐍⦃T1⦄ → T1 = T2.
+      ∀T1,T2. ❪G,L❫ ⊢ T1 ➡*[h] T2 → ❪G,L❫ ⊢ ➡[h] 𝐍❪T1❫ → T1 = T2.
 #h #G #L #T1 #T2 #H @(cprs_ind_sn … H) -T1 //
 #T1 #T0 #HT10 #_ #IH #HT1
 lapply (HT1 … HT10) -HT10 #H destruct /2 width=1 by/