- a caracterization of the top elements of the local evironment

[helm.git] / matita / matita / contribs / lambda_delta / basic_2 / reducibility / cpr_cpr.ma

diff --git a/matita/matita/contribs/lambda_delta/basic_2/reducibility/cpr_cpr.ma b/matita/matita/contribs/lambda_delta/basic_2/reducibility/cpr_cpr.ma
index 4fa94673eb8f97a7dcf89a9118bd3fc882fbce39..aadf05b82bf4d9775b47def00d1c0ab9019875dd 100644 (file)
--- a/matita/matita/contribs/lambda_delta/basic_2/reducibility/cpr_cpr.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/reducibility/cpr_cpr.ma
@@ -43,7 +43,7 @@ qed.
 
 (* Advanced forward lemmas **************************************************)
 
-lemma cpr_shift_fwd: ∀L,T1,T2. L ⊢ T1 ➡ T2 → L @ T1 ➡ L @ T2.
+lemma cpr_shift_fwd: ∀L,T1,T2. L ⊢ T1 ➡ T2 → L @@ T1 ➡ L @@ T2.
 #L elim L -L
 [ #T1 #T2 #HT12 @(cpr_inv_atom … HT12)
 | normalize /3 width=1/