X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_transition%2Flfpx_drops.ma;h=9353adda65f82154e9c1b84d4588542e7df50eb2;hb=cce6d001d2c71a0a7f4b6d4bb136d105224b2cd1;hp=55c4051628ca455bd10df0706428d3b9e475172e;hpb=0c7cb3c503c0fcab104ad89ebc88683dc9830d06;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_drops.ma
index 55c405162..9353adda6 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/lfpx_drops.ma
@@ -16,17 +16,28 @@ include "basic_2/static/lfxs_drops.ma".
 include "basic_2/rt_transition/cpx_drops.ma".
 include "basic_2/rt_transition/lfpx.ma".
 
-(* UNCOUNTED PARALLEL RT-TRANSITION FOR LOCAL ENV.S ON REFERRED ENTRIES *****)
+(* UNBOUND PARALLEL RT-TRANSITION FOR LOCAL ENV.S ON REFERRED ENTRIES *******)
 
 (* Properties with generic slicing for local environments *******************)
 
+(* Basic_2A1: uses: drop_lpx_trans *) 
 lemma drops_lfpx_trans: ∀h,G. dedropable_sn (cpx h G).
-/3 width=6 by lfxs_liftable_dedropable, cpx_lifts/ qed-.
+/3 width=6 by lfxs_liftable_dedropable_sn, cpx_lifts_sn/ qed-.
 
 (* Inversion lemmas with generic slicing for local environments *************)
 
+(* Basic_2A1: uses: lpx_drop_conf *)
 lemma lfpx_drops_conf: ∀h,G. dropable_sn (cpx h G).
 /2 width=5 by lfxs_dropable_sn/ qed-.
 
+(* Basic_2A1: uses: lpx_drop_trans_O1 *)
 lemma lfpx_drops_trans: ∀h,G. dropable_dx (cpx h G).
 /2 width=5 by lfxs_dropable_dx/ qed-.
+
+lemma lfpx_inv_lref_pair_sn: ∀h,G,L1,L2,i. ⦃G, L1⦄ ⊢ ⬈[h, #i] L2 → ∀I,K1,V1. ⬇*[i] L1 ≘ K1.ⓑ{I}V1 →
+                             ∃∃K2,V2. ⬇*[i] L2 ≘ K2.ⓑ{I}V2 & ⦃G, K1⦄ ⊢ ⬈[h, V1] K2 & ⦃G, K1⦄ ⊢ V1 ⬈[h] V2.
+/2 width=3 by lfxs_inv_lref_pair_sn/ qed-.
+
+lemma lfpx_inv_lref_pair_dx: ∀h,G,L1,L2,i. ⦃G, L1⦄ ⊢ ⬈[h, #i] L2 → ∀I,K2,V2. ⬇*[i] L2 ≘ K2.ⓑ{I}V2 →
+                             ∃∃K1,V1. ⬇*[i] L1 ≘ K1.ⓑ{I}V1 & ⦃G, K1⦄ ⊢ ⬈[h, V1] K2 & ⦃G, K1⦄ ⊢ V1 ⬈[h] V2.
+/2 width=3 by lfxs_inv_lref_pair_dx/ qed-.