- degree-based equivalene for terms

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / etc_2A1 / fpbc / fpbs_fpbc.etc

diff --git a/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/fpbc/fpbs_fpbc.etc b/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/fpbc/fpbs_fpbc.etc
new file mode 100644 (file)
index 0000000..a88d519
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/basic_2/etc_2A1/fpbc/fpbs_fpbc.etc
@@ -0,0 +1,26 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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/reduction/fpbc.ma".
+include "basic_2/computation/fpbs_fleq.ma".
+
+(* "QRST" PARALLEL COMPUTATION FOR CLOSURES *********************************)
+
+(* Properties on "qrst" proper parallel reduction for closures **************)
+
+lemma fpbc_fpbs: ∀h,g,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ≻≡[h, g] ⦃G2, L2, T2⦄ →
+                 ⦃G1, L1, T1⦄ ≥[h, g] ⦃G2, L2, T2⦄.
+#h #g #G1 #G2 #L1 #L2 #T1 #T2 *
+/3 width=5 by fpbu_fwd_fpb, fpbs_strap2, fleq_fpbs/
+qed-.