X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2Fbasic_2%2Fcomputation%2Fcpe.ma;h=285e6e4fc23c18d04878e2323a1d0b8009c70a0c;hb=f7386d0b74f935f07ede4be46d0489a233d68b85;hp=8877fa44f2213d357e193aef2b74f17e2b606f48;hpb=5ac2dc4e01aca542ddd13c02b304c646d8df9799;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/basic_2/computation/cpe.ma b/matita/matita/contribs/lambda_delta/basic_2/computation/cpe.ma
index 8877fa44f..285e6e4fc 100644
--- a/matita/matita/contribs/lambda_delta/basic_2/computation/cpe.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/computation/cpe.ma
@@ -26,7 +26,7 @@ interpretation "context-sensitive parallel evaluation (term)"
 (* Basic_properties *********************************************************)
 
 (* Basic_1: was: nf2_sn3 *)
-lemma cpe_csn: ∀L,T1. L ⊢ ⬇* T1 → ∃T2. L ⊢ T1 ➡* 𝐍⦃T2⦄.
+lemma cpe_csn: ∀L,T1. L ⊢ ⬊* T1 → ∃T2. L ⊢ T1 ➡* 𝐍⦃T2⦄.
 #L #T1 #H @(csn_ind … H) -T1
 #T1 #_ #IHT1
 elim (cnf_dec L T1) /3 width=3/