- degree-based equivalene for terms

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / etc / fpa / fpa.etc

diff --git a/matita/matita/contribs/lambdadelta/basic_2/etc/fpa/fpa.etc b/matita/matita/contribs/lambdadelta/basic_2/etc/fpa/fpa.etc
deleted file mode 100644 (file)
index 8f72937..0000000
--- a/matita/matita/contribs/lambdadelta/basic_2/etc/fpa/fpa.etc
+++ /dev/null
@@ -1,36 +0,0 @@
-(**************************************************************************)
-(*       ___                                                              *)
-(*      ||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/notation/relations/rajust_5.ma".
-include "basic_2/substitution/drop.ma".
-
-(* AJUSTMENT ****************************************************************)
-
-inductive fpa (s:bool): bi_relation lenv term ≝
-| fpa_fwd: ∀L,K,T,U,d,e. ⇩[s, d, e] L ≡ K → ⇧[d, e] T ≡ U → fpa s K T L U
-| fpa_bwd: ∀L,K,T,U,d,e. ⇩[s, d, e] L ≡ K → ⇧[d, e] T ≡ U → fpa s L U K T
-.
-
-interpretation
-   "ajustment (restricted closure)"
-   'RAjust L1 T1 s L2 T2 = (fpa s L1 T1 L2 T2).
-
-(* Basic properties *********************************************************)
-
-lemma fpa_refl: ∀s. bi_reflexive … (fpa s).
-/2 width=4 by fpa_fwd/ qed.
-
-lemma fpa_sym: ∀s. bi_symmetric … (fpa s).
-#s #L1 #L2 #T1 #T2 * /2 width=4 by fpa_fwd, fpa_bwd/
-qed-.