X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Fseq_length.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Fseq_length.ma;h=4055f6638f428114f1fb4418e00cf548bdbfadbf;hb=222044da28742b24584549ba86b1805a87def070;hp=0000000000000000000000000000000000000000;hpb=5c186c72f508da0849058afeecc6877cd9ed6303;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/relocation/seq_length.ma b/matita/matita/contribs/lambdadelta/basic_2/relocation/seq_length.ma
new file mode 100644
index 000000000..4055f6638
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/basic_2/relocation/seq_length.ma
@@ -0,0 +1,24 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||M||                                                             *)
+(*      ||A||       A project by Andrea Asperti                           *)
+(*      ||T||                                                             *)
+(*      ||I||       Developers:                                           *)
+(*      ||T||         The HELM team.                                      *)
+(*      ||A||         http://helm.cs.unibo.it                             *)
+(*      \   /                                                             *)
+(*       \ /        This file is distributed under the terms of the       *)
+(*        v         GNU General Public License Version 2                  *)
+(*                                                                        *)
+(**************************************************************************)
+
+include "basic_2/relocation/sex_length.ma".
+include "basic_2/relocation/seq.ma".
+
+(* SYNTACTIC EQUIVALENCE FOR SELECTED LOCAL ENVIRONMENTS ********************)
+
+(* Forward lemmas with length for local environments ************************)
+
+(* Basic_2A1: includes: lreq_fwd_length *)
+lemma seq_fwd_length: ∀f,L1,L2. L1 ≡[f] L2 → |L1| = |L2|.
+/2 width=4 by sex_fwd_length/ qed-.