update in basic_2 + web page

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / relocation / lreq_length.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/relocation/lreq_length.ma b/matita/matita/contribs/lambdadelta/basic_2/relocation/lreq_length.ma
index 817360e99b1349e7a2b7859dc16068a8ea994205..69c4efa31120341bc33d5c31ea0968f5db4ad64f 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/relocation/lreq_length.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/relocation/lreq_length.ma
@@ -20,5 +20,5 @@ include "basic_2/relocation/lreq.ma".
 (* Forward lemmas with length for local environments ************************)
 
 (* Basic_2A1: includes: lreq_fwd_length *)
-lemma lreq_fwd_length: ∀L1,L2,f. L1 ≡[f] L2 → |L1| = |L2|.
+lemma lreq_fwd_length: ∀f,L1,L2. L1 ≐[f] L2 → |L1| = |L2|.
 /2 width=4 by lexs_fwd_length/ qed-.