matita/matita/contribs/lambdadelta/basic_2/rt_transition/cnx_drops.ma

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   2 (*       ___                                                              *)
   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                  *)
  12 (*                                                                        *)
  13 (**************************************************************************)
  14
  15 include "basic_2/relocation/lifts_tdeq.ma".
  16 include "basic_2/rt_transition/cpx_drops.ma".
  17 include "basic_2/rt_transition/cnx.ma".
  18
  19 (* NORMAL TERMS FOR UNCOUNTED CONTEXT-SENSITIVE PARALLEL RT-TRANSITION ******)
  20
  21 (* Properties with generic slicing ******************************************)
  22
  23 lemma cnx_lref_atom: ∀h,o,G,L,i. ⬇*[i] L ≡ ⋆ → ⦃G, L⦄ ⊢ ⬈[h, o] 𝐍⦃#i⦄.
  24 #h #o #G #L #i #Hi #X #H elim (cpx_inv_lref1_drops … H) -H // *
  25 #I #K #V1 #V2 #HLK lapply (drops_mono … Hi … HLK) -L #H destruct
  26 qed.
  27
  28 (* Basic_2A1: includes: cnx_lift *)
  29 lemma cnx_lifts: ∀h,o,G. d_liftable1 … (cnx h o G).
  30 #h #o #G #K #T #HT #b #f #L #HLK #U #HTU #U0 #H
  31 elim (cpx_inv_lifts_sn … H … HLK … HTU) -b -L #T0 #HTU0 #HT0
  32 lapply (HT … HT0) -G -K /2 width=6 by tdeq_lifts_bi/
  33 qed-.
  34
  35 (* Inversion lemmas with generic slicing ************************************)
  36
  37 (* Basic_2A1: was: cnx_inv_delta *)
  38 lemma cnx_inv_lref_pair: ∀h,o,I,G,L,K,V,i. ⬇*[i] L ≡ K.ⓑ{I}V → ⦃G, L⦄ ⊢ ⬈[h, o] 𝐍⦃#i⦄ → ⊥.
  39 #h #o #I #G #L #K #V #i #HLK #H
  40 elim (lifts_total V (𝐔❴⫯i❵)) #W #HVW
  41 lapply (H W ?) -H /2 width=7 by cpx_delta_drops/ -HLK
  42 #H lapply (tdeq_inv_lref1 … H) -H #H destruct
  43 /2 width=5 by lifts_inv_lref2_uni_lt/
  44 qed-.
  45
  46 (* Basic_2A1: includes: cnx_inv_lift *)
  47 lemma cnx_inv_lifts: ∀h,o,G. d_deliftable1 … (cnx h o G).
  48 #h #o #G #L #U #HU #b #f #K #HLK #T #HTU #T0 #H
  49 elim (cpx_lifts_sn … H … HLK … HTU) -b -K #U0 #HTU0 #HU0
  50 lapply (HU … HU0) -G -L /2 width=6 by tdeq_inv_lifts_bi/
  51 qed-.