X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fdynamic%2Fcnv_preserve.ma;h=4ea01e53417a1eaa72f4f3a840ae2dfb9d7bbf10;hp=9e372bb3eeb873bfc06b3a94e455d5c03426f275;hb=e9b09b14538f770b9e65083c24e3e9cf487df648;hpb=945b096d007f70e8336847f07b174c48f26467e0

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_preserve.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_preserve.ma
index 9e372bb3e..4ea01e534 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_preserve.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_preserve.ma
@@ -17,88 +17,33 @@ include "basic_2/dynamic/cnv_cpms_conf.ma".
 (* CONTEXT-SENSITIVE NATIVE VALIDITY FOR TERMS ******************************)
 
 (* Main preservation properties *********************************************)
-(*
+
 (* Basic_2A1: uses: snv_preserve *)
 lemma cnv_preserve (a) (h): ∀G,L,T. ⦃G,L⦄ ⊢ T ![a,h] →
                             ∧∧ IH_cnv_cpms_conf_lpr a h G L T
                              & IH_cnv_cpm_trans_lpr a h G L T.
 #a #h #G #L #T #HT
-elim (tdpos_total h … T) #o
+letin o ≝ (sd_O h)
 lapply (cnv_fwd_fsb … o … HT) -HT #H
-@(fsb_ind_fpbg … H) -G -L -T #G #L #T #_ #IH #Ho
+@(fsb_ind_fpbg … H) -G -L -T #G #L #T #_ #IH
 @conj [ letin aux ≝ cnv_cpms_conf_lpr_aux | letin aux ≝ cnv_cpm_trans_lpr_aux ]
 @(aux … o … G L T) // #G0 #L0 #T0 #H
 elim (IH … H) -IH -H //
-
-
-lemma snv_preserve: ∀h,o,G,L,T. ⦃G, L⦄ ⊢ T ¡[h, o] →
-                    ∧∧ IH_da_cpr_lpr h o G L T
-                     & IH_snv_cpr_lpr h o G L T
-                     & IH_snv_lstas h o G L T
-                     & IH_lstas_cpr_lpr h o G L T.
-#h #o #G #L #T #HT elim (snv_fwd_aaa … HT) -HT
-#A #HT @(aaa_ind_fpbg h o … HT) -G -L -T -A
-#G #L #T #A #_ #IH -A @and4_intro
-[ letin aux ≝ da_cpr_lpr_aux | letin aux ≝ snv_cpr_lpr_aux
-| letin aux ≝ snv_lstas_aux | letin aux ≝ lstas_cpr_lpr_aux
-]
-@(aux … G L T) // #G0 #L0 #T0 #H elim (IH … H) -IH -H //
-qed-.
-
-theorem da_cpr_lpr: ∀h,o,G,L,T. IH_da_cpr_lpr h o G L T.
-#h #o #G #L #T #HT elim (snv_preserve … HT) /2 width=1 by/
-qed-.
-
-theorem snv_cpr_lpr: ∀h,o,G,L,T. IH_snv_cpr_lpr h o G L T.
-#h #o #G #L #T #HT elim (snv_preserve … HT) /2 width=1 by/
 qed-.
 
-theorem snv_lstas: ∀h,o,G,L,T. IH_snv_lstas h o G L T.
-#h #o #G #L #T #HT elim (snv_preserve … HT) /2 width=5 by/
+theorem cnv_cpms_conf_lpr (a) (h) (G) (L) (T): IH_cnv_cpms_conf_lpr a h G L T.
+#a #h #G #L #T #HT elim (cnv_preserve … HT) /2 width=1 by/
 qed-.
 
-theorem lstas_cpr_lpr: ∀h,o,G,L,T. IH_lstas_cpr_lpr h o G L T.
-#h #o #G #L #T #HT elim (snv_preserve … HT) /2 width=3 by/
+(* Basic_2A1: uses: snv_cpr_lpr *)
+theorem cnv_cpm_trans_lpr (a) (h) (G) (L) (T): IH_cnv_cpm_trans_lpr a h G L T.
+#a #h #G #L #T #HT elim (cnv_preserve … HT) /2 width=2 by/
 qed-.
 
 (* Advanced preservation properties *****************************************)
 
-lemma snv_cprs_lpr: ∀h,o,G,L1,T1. ⦃G, L1⦄ ⊢ T1 ¡[h, o] →
-                    ∀T2. ⦃G, L1⦄ ⊢ T1 ➡* T2 → ∀L2. ⦃G, L1⦄ ⊢ ➡ L2 → ⦃G, L2⦄ ⊢ T2 ¡[h, o].
-#h #o #G #L1 #T1 #HT1 #T2 #H
-@(cprs_ind … H) -T2 /3 width=5 by snv_cpr_lpr/
-qed-.
-
-lemma da_cprs_lpr: ∀h,o,G,L1,T1. ⦃G, L1⦄ ⊢ T1 ¡[h, o] →
-                   ∀d. ⦃G, L1⦄ ⊢ T1 ▪[h, o] d →
-                   ∀T2. ⦃G, L1⦄ ⊢ T1 ➡* T2 → ∀L2. ⦃G, L1⦄ ⊢ ➡ L2 → ⦃G, L2⦄ ⊢ T2 ▪[h, o] d.
-#h #o #G #L1 #T1 #HT1 #d #Hd #T2 #H
-@(cprs_ind … H) -T2 /3 width=6 by snv_cprs_lpr, da_cpr_lpr/
-qed-.
-
-lemma lstas_cprs_lpr: ∀h,o,G,L1,T1. ⦃G, L1⦄ ⊢ T1 ¡[h, o] →
-                      ∀d1,d2. d2 ≤ d1 → ⦃G, L1⦄ ⊢ T1 ▪[h, o] d1 →
-                      ∀U1. ⦃G, L1⦄ ⊢ T1 •*[h, d2] U1 →
-                      ∀T2. ⦃G, L1⦄ ⊢ T1 ➡* T2 → ∀L2. ⦃G, L1⦄ ⊢ ➡ L2 →
-                      ∃∃U2. ⦃G, L2⦄ ⊢ T2 •*[h, d2] U2 & ⦃G, L2⦄ ⊢ U1 ⬌* U2.
-#h #o #G #L1 #T1 #HT1 #d1 #d2 #Hd21 #Hd1 #U1 #HTU1 #T2 #H
-@(cprs_ind … H) -T2 [ /2 width=10 by lstas_cpr_lpr/ ]
-#T #T2 #HT1T #HTT2 #IHT1 #L2 #HL12
-elim (IHT1 L1) // -IHT1 #U #HTU #HU1
-elim (lstas_cpr_lpr … o … Hd21 … HTU … HTT2 … HL12) -HTU -HTT2
-[2,3: /2 width=7 by snv_cprs_lpr, da_cprs_lpr/ ] -T1 -T -d1
-/4 width=5 by lpr_cpcs_conf, cpcs_trans, ex2_intro/
-qed-.
-
-lemma lstas_cpcs_lpr: ∀h,o,G,L1,T1. ⦃G, L1⦄ ⊢ T1 ¡[h, o] →
-                      ∀d,d1. d ≤ d1 → ⦃G, L1⦄ ⊢ T1 ▪[h, o] d1 → ∀U1. ⦃G, L1⦄ ⊢ T1 •*[h, d] U1 →
-                      ∀T2. ⦃G, L1⦄ ⊢ T2 ¡[h, o] →
-                      ∀d2. d ≤ d2 → ⦃G, L1⦄ ⊢ T2 ▪[h, o] d2 → ∀U2. ⦃G, L1⦄ ⊢ T2 •*[h, d] U2 →
-                      ⦃G, L1⦄ ⊢ T1 ⬌* T2 → ∀L2. ⦃G, L1⦄ ⊢ ➡ L2 → ⦃G, L2⦄ ⊢ U1 ⬌* U2.
-#h #o #G #L1 #T1 #HT1 #d #d1 #Hd1 #HTd1 #U1 #HTU1 #T2 #HT2 #d2 #Hd2 #HTd2 #U2 #HTU2 #H #L2 #HL12
-elim (cpcs_inv_cprs … H) -H #T #H1 #H2
-elim (lstas_cprs_lpr … HT1 … Hd1 HTd1 … HTU1 … H1 … HL12) -T1 #W1 #H1 #HUW1
-elim (lstas_cprs_lpr … HT2 … Hd2 HTd2 … HTU2 … H2 … HL12) -T2 #W2 #H2 #HUW2
-lapply (lstas_mono … H1 … H2) -h -T -d #H destruct /2 width=3 by cpcs_canc_dx/
+(* Basic_2A1: uses: snv_cprs_lpr *)
+lemma cnv_cpms_trans_lpr (a) (h) (G) (L) (T): IH_cnv_cpms_trans_lpr a h G L T.
+#a #h #G #L1 #T1 #HT1 #n #T2 #H
+@(cpms_ind_dx … H) -n -T2 /3 width=6 by cnv_cpm_trans_lpr/
 qed-.
-*)