update in lambdadelta

[helm.git] / matita / matita / contribs / lambdadelta / basic_2A / dynamic / lsubsv_cpcs.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2A/dynamic/lsubsv_cpcs.ma b/matita/matita/contribs/lambdadelta/basic_2A/dynamic/lsubsv_cpcs.ma
new file mode 100644 (file)
index 0000000..0d0e80a
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/basic_2A/dynamic/lsubsv_cpcs.ma
@@ -0,0 +1,25 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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_2A/equivalence/cpcs_cpcs.ma".
+include "basic_2A/dynamic/lsubsv.ma".
+
+(* LOCAL ENVIRONMENT REFINEMENT FOR STRATIFIED NATIVE VALIDITY **************)
+
+(* Properties on context-sensitive parallel equivalence for terms ***********)
+
+lemma lsubsv_cpcs_trans: ∀h,g,G,L1,L2. G ⊢ L1 ⫃¡[h, g] L2 →
+                         ∀T1,T2. ⦃G, L2⦄ ⊢ T1 ⬌* T2 → ⦃G, L1⦄ ⊢ T1 ⬌* T2.
+/3 width=6 by lsubsv_fwd_lsubr, lsubr_cpcs_trans/
+qed-.