matita/matita/contribs/lambda_delta/basic_2/reducibility/ltpr_aaa.ma

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   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
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  10 (*       \ /        This file is distributed under the terms of the       *)
  11 (*        v         GNU General Public License Version 2                  *)
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  13 (**************************************************************************)
  14
  15 include "basic_2/static/aaa_ltpss.ma".
  16 include "basic_2/static/lsuba_aaa.ma".
  17 include "basic_2/reducibility/ltpr_ldrop.ma".
  18
  19 (* CONTEXT-FREE PARALLEL REDUCTION ON LOCAL ENVIRONMENTS ********************)
  20
  21 (* Properties about atomic arity assignment on terms ************************)
  22
  23 fact aaa_ltpr_tpr_conf_aux: ∀L,T,L1,T1,A. L1 ⊢ T1 ⁝ A → L = L1 → T = T1 →
  24                             ∀L2. L1 ➡ L2 → ∀T2. T1 ➡ T2 → L2 ⊢ T2 ⁝ A.
  25 #L #T @(cw_wf_ind … L T) -L -T #L #T #IH
  26 #L1 #T1 #A * -L1 -T1 -A
  27 [ -IH #L1 #k #H1 #H2 #L2 #_ #T2 #H destruct
  28   >(tpr_inv_atom1 … H) -H //
  29 | #I #L1 #K1 #V1 #B #i #HLK1 #HK1 #H1 #H2 #L2 #HL12 #T2 #H destruct
  30   >(tpr_inv_atom1 … H) -T2
  31   lapply (ldrop_pair2_fwd_cw … HLK1 (#i)) #HKV1
  32   elim (ltpr_ldrop_conf … HLK1 … HL12) -HLK1 -HL12 #X #HLK2 #H
  33   elim (ltpr_inv_pair1 … H) -H #K2 #V2 #HK12 #HV12 #H destruct
  34   lapply (IH … HKV1 … HK1 … HK12 … HV12) // -L1 -K1 -V1 /2 width=5/
  35 | #L1 #V1 #T1 #B #A #HB #HA #H1 #H2 #L2 #HL12 #X #H destruct
  36   elim (tpr_inv_abbr1 … H) -H *
  37   [ #V2 #T0 #T2 #HV12 #HT10 #HT02 #H destruct
  38     lapply (tps_lsubs_trans … HT02 (L2.ⓓV2) ?) -HT02 /2 width=1/ #HT02
  39     lapply (IH … HB … HL12 … HV12) -HB /width=5/ #HB
  40     lapply (IH … HA … (L2.ⓓV2) … HT10) -IH -HA -HT10 /width=5/ -T1 /2 width=1/ -L1 -V1 /3 width=5/
  41   | -B #T #HT1 #HTX
  42     elim (lift_total X 0 1) #X1 #HX1
  43     lapply (tpr_lift … HTX … HT1 … HX1) -T #HTX1
  44     lapply (IH … HA … (L2.ⓓV1) … HTX1) /width=5/ -T1 /2 width=1/ -L1 #HA
  45     @(aaa_inv_lift … HA … HX1) /2 width=1/
  46   ]
  47 | #L1 #V1 #T1 #B #A #HB #HA #H1 #H2 #L2 #HL12 #X #H destruct
  48   elim (tpr_inv_abst1 … H) -H #V2 #T2 #HV12 #HT12 #H destruct
  49   lapply (IH … HB … HL12 … HV12) -HB /width=5/ #HB
  50   lapply (IH … HA … (L2.ⓛV2) … HT12) -IH -HA -HT12 /width=5/ -T1 /2 width=1/
  51 | #L1 #V1 #T1 #B #A #HV1 #HT1 #H1 #H2 #L2 #HL12 #X #H destruct
  52   elim (tpr_inv_appl1 … H) -H *
  53   [ #V2 #T2 #HV12 #HT12 #H destruct
  54     lapply (IH … HV1 … HL12 … HV12) -HV1 -HV12 /width=5/ #HB
  55     lapply (IH … HT1 … HL12 … HT12) -IH -HT1 -HL12 -HT12 /width=5/ /2 width=3/
  56   | #V2 #W2 #T0 #T2 #HV12 #HT02 #H1 #H2 destruct
  57     elim (aaa_inv_abst … HT1) -HT1 #B0 #A0 #HB0 #HA0 #H destruct
  58     lapply (IH … HV1 … HL12 … HV12) -HV1 -HV12 /width=5/ #HB
  59     lapply (IH … HB0  … HL12 W2 ?) -HB0 /width=5/ #HB0
  60     lapply (IH … HA0 … (L2.ⓛW2) … HT02) -IH -HA0 -HT02 /width=5/ -T0 /2 width=1/ -L1 -V1 /4 width=7/
  61   | #V0 #V2 #W0 #W2 #T0 #T2 #HV10 #HW02 #HT02 #HV02 #H1 #H2 destruct
  62     elim (aaa_inv_abbr … HT1) -HT1 #B0 #HW0 #HT0
  63     lapply (IH … HW0  … HL12 … HW02) -HW0 /width=5/ #HW2
  64     lapply (IH … HV1 … HL12 … HV10) -HV1 -HV10 /width=5/ #HV0
  65     lapply (IH … HT0 … (L2.ⓓW2) … HT02) -IH -HT0 -HT02 /width=5/ -V1 -T0 /2 width=1/ -L1 -W0 #HT2
  66     @(aaa_abbr … HW2) -HW2
  67     @(aaa_appl … HT2) -HT2 /3 width=7/ (**) (* explict constructors, /5 width=7/ is too slow *)
  68   ]
  69 | #L1 #V1 #T1 #A #HV1 #HT1 #H1 #H2 #L2 #HL12 #X #H destruct
  70   elim (tpr_inv_cast1 … H) -H
  71   [ * #V2 #T2 #HV12 #HT12 #H destruct
  72     lapply (IH … HV1 … HL12 … HV12) -HV1 -HV12 /width=5/ #HV2
  73     lapply (IH … HT1 … HL12 … HT12) -IH -HT1 -HL12 -HT12 /width=5/ -L1 -V1 -T1 /2 width=1/
  74   | -HV1 #HT1X
  75      lapply (IH … HT1 … HL12 … HT1X) -IH -HT1 -HL12 -HT1X /width=5/
  76   ]
  77 ]
  78 qed.
  79
  80 lemma aaa_ltpr_tpr_conf: ∀L1,T1,A. L1 ⊢ T1 ⁝ A → ∀L2. L1 ➡ L2 →
  81                          ∀T2. T1 ➡ T2 → L2 ⊢ T2 ⁝ A.
  82 /2 width=9/ qed.
  83
  84 lemma aaa_ltpr_conf: ∀L1,T,A. L1 ⊢ T ⁝ A → ∀L2. L1 ➡ L2 → L2 ⊢ T ⁝ A.
  85 /2 width=5/ qed.
  86
  87 lemma aaa_tpr_conf: ∀L,T1,A. L ⊢ T1 ⁝ A → ∀T2. T1 ➡ T2 → L ⊢ T2 ⁝ A.
  88 /2 width=5/ qed.