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4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
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15 include "basic_2/rt_transition/lfpx.ma".
17 (* UNCOUNTED PARALLEL RT-COMPUTATION FOR LOCAL ENV.S ON REFERRED ENTRIES ****)
21 (* Properties on supclosure *************************************************)
24 lemma lpxs_fquq_trans: ∀h,o,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐⸮ ⦃G2, L2, T2⦄ →
25 ∀K1. ⦃G1, K1⦄ ⊢ ➡*[h, o] L1 →
26 ∃∃K2,T. ⦃G1, K1⦄ ⊢ T1 ➡*[h, o] T & ⦃G1, K1, T⦄ ⊐⸮ ⦃G2, K2, T2⦄ & ⦃G2, K2⦄ ⊢ ➡*[h, o] L2.
27 #h #o #G1 #G2 #L1 #L2 #T1 #T2 #HT12 #K1 #H @(lpxs_ind_dx … H) -K1
28 [ /2 width=5 by ex3_2_intro/
29 | #K1 #K #HK1 #_ * #L #T #HT1 #HT2 #HL2 -HT12
30 lapply (lpx_cpxs_trans … HT1 … HK1) -HT1
31 elim (lpx_fquq_trans … HT2 … HK1) -K
32 /3 width=7 by lpxs_strap2, cpxs_strap1, ex3_2_intro/
36 lemma lpxs_fqup_trans: ∀h,o,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐+ ⦃G2, L2, T2⦄ →
37 ∀K1. ⦃G1, K1⦄ ⊢ ➡*[h, o] L1 →
38 ∃∃K2,T. ⦃G1, K1⦄ ⊢ T1 ➡*[h, o] T & ⦃G1, K1, T⦄ ⊐+ ⦃G2, K2, T2⦄ & ⦃G2, K2⦄ ⊢ ➡*[h, o] L2.
39 #h #o #G1 #G2 #L1 #L2 #T1 #T2 #HT12 #K1 #H @(lpxs_ind_dx … H) -K1
40 [ /2 width=5 by ex3_2_intro/
41 | #K1 #K #HK1 #_ * #L #T #HT1 #HT2 #HL2 -HT12
42 lapply (lpx_cpxs_trans … HT1 … HK1) -HT1
43 elim (lpx_fqup_trans … HT2 … HK1) -K
44 /3 width=7 by lpxs_strap2, cpxs_trans, ex3_2_intro/
48 lemma lpxs_fqus_trans: ∀h,o,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐* ⦃G2, L2, T2⦄ →
49 ∀K1. ⦃G1, K1⦄ ⊢ ➡*[h, o] L1 →
50 ∃∃K2,T. ⦃G1, K1⦄ ⊢ T1 ➡*[h, o] T & ⦃G1, K1, T⦄ ⊐* ⦃G2, K2, T2⦄ & ⦃G2, K2⦄ ⊢ ➡*[h, o] L2.
51 #h #o #G1 #G2 #L1 #L2 #T1 #T2 #H @(fqus_ind … H) -G2 -L2 -T2 /2 width=5 by ex3_2_intro/
52 #G #G2 #L #L2 #T #T2 #_ #H2 #IH1 #K1 #HLK1 elim (IH1 … HLK1) -L1
53 #L0 #T0 #HT10 #HT0 #HL0 elim (lpxs_fquq_trans … H2 … HL0) -L
54 #L #T3 #HT3 #HT32 #HL2 elim (fqus_cpxs_trans … HT3 … HT0) -T
55 /3 width=7 by cpxs_trans, fqus_strap1, ex3_2_intro/
58 lemma lpxs_lleq_fqu_trans: ∀h,o,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐ ⦃G2, L2, T2⦄ →
59 ∀K1. ⦃G1, K1⦄ ⊢ ➡*[h, o] L1 → K1 ≡[T1, 0] L1 →
60 ∃∃K2. ⦃G1, K1, T1⦄ ⊐ ⦃G2, K2, T2⦄ & ⦃G2, K2⦄ ⊢ ➡*[h, o] L2 & K2 ≡[T2, 0] L2.
61 #h #o #G1 #G2 #L1 #L2 #T1 #T2 #H elim H -G1 -G2 -L1 -L2 -T1 -T2
62 [ #I #G1 #L1 #V1 #X #H1 #H2 elim (lpxs_inv_pair2 … H1) -H1
63 #K0 #V0 #H1KL1 #_ #H destruct
64 elim (lleq_inv_lref_ge_dx … H2 ? I L1 V1) -H2 //
65 #K1 #H #H2KL1 lapply (drop_inv_O2 … H) -H #H destruct
66 /2 width=4 by fqu_lref_O, ex3_intro/
67 | * [ #a ] #I #G1 #L1 #V1 #T1 #K1 #HLK1 #H
68 [ elim (lleq_inv_bind … H)
69 | elim (lleq_inv_flat … H)
70 ] -H /2 width=4 by fqu_pair_sn, ex3_intro/
71 | #a #I #G1 #L1 #V1 #T1 #K1 #HLK1 #H elim (lleq_inv_bind_O … H) -H
72 /3 width=4 by lpxs_pair, fqu_bind_dx, ex3_intro/
73 | #I #G1 #L1 #V1 #T1 #K1 #HLK1 #H elim (lleq_inv_flat … H) -H
74 /2 width=4 by fqu_flat_dx, ex3_intro/
75 | #G1 #L1 #L #T1 #U1 #k #HL1 #HTU1 #K1 #H1KL1 #H2KL1
76 elim (drop_O1_le (Ⓕ) (k+1) K1)
77 [ #K #HK1 lapply (lleq_inv_lift_le … H2KL1 … HK1 HL1 … HTU1 ?) -H2KL1 //
78 #H2KL elim (lpxs_drop_trans_O1 … H1KL1 … HL1) -L1
79 #K0 #HK10 #H1KL lapply (drop_mono … HK10 … HK1) -HK10 #H destruct
80 /3 width=4 by fqu_drop, ex3_intro/
81 | lapply (drop_fwd_length_le2 … HL1) -L -T1 -o
82 lapply (lleq_fwd_length … H2KL1) //
87 lemma lpxs_lleq_fquq_trans: ∀h,o,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐⸮ ⦃G2, L2, T2⦄ →
88 ∀K1. ⦃G1, K1⦄ ⊢ ➡*[h, o] L1 → K1 ≡[T1, 0] L1 →
89 ∃∃K2. ⦃G1, K1, T1⦄ ⊐⸮ ⦃G2, K2, T2⦄ & ⦃G2, K2⦄ ⊢ ➡*[h, o] L2 & K2 ≡[T2, 0] L2.
90 #h #o #G1 #G2 #L1 #L2 #T1 #T2 #H #K1 #H1KL1 #H2KL1
91 elim (fquq_inv_gen … H) -H
92 [ #H elim (lpxs_lleq_fqu_trans … H … H1KL1 H2KL1) -L1
93 /3 width=4 by fqu_fquq, ex3_intro/
94 | * #HG #HL #HT destruct /2 width=4 by ex3_intro/
98 lemma lpxs_lleq_fqup_trans: ∀h,o,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐+ ⦃G2, L2, T2⦄ →
99 ∀K1. ⦃G1, K1⦄ ⊢ ➡*[h, o] L1 → K1 ≡[T1, 0] L1 →
100 ∃∃K2. ⦃G1, K1, T1⦄ ⊐+ ⦃G2, K2, T2⦄ & ⦃G2, K2⦄ ⊢ ➡*[h, o] L2 & K2 ≡[T2, 0] L2.
101 #h #o #G1 #G2 #L1 #L2 #T1 #T2 #H @(fqup_ind … H) -G2 -L2 -T2
102 [ #G2 #L2 #T2 #H #K1 #H1KL1 #H2KL1 elim (lpxs_lleq_fqu_trans … H … H1KL1 H2KL1) -L1
103 /3 width=4 by fqu_fqup, ex3_intro/
104 | #G #G2 #L #L2 #T #T2 #_ #HT2 #IHT1 #K1 #H1KL1 #H2KL1 elim (IHT1 … H2KL1) // -L1
105 #K #HT1 #H1KL #H2KL elim (lpxs_lleq_fqu_trans … HT2 … H1KL H2KL) -L
106 /3 width=5 by fqup_strap1, ex3_intro/
110 lemma lpxs_lleq_fqus_trans: ∀h,o,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐* ⦃G2, L2, T2⦄ →
111 ∀K1. ⦃G1, K1⦄ ⊢ ➡*[h, o] L1 → K1 ≡[T1, 0] L1 →
112 ∃∃K2. ⦃G1, K1, T1⦄ ⊐* ⦃G2, K2, T2⦄ & ⦃G2, K2⦄ ⊢ ➡*[h, o] L2 & K2 ≡[T2, 0] L2.
113 #h #o #G1 #G2 #L1 #L2 #T1 #T2 #H #K1 #H1KL1 #H2KL1
114 elim (fqus_inv_gen … H) -H
115 [ #H elim (lpxs_lleq_fqup_trans … H … H1KL1 H2KL1) -L1
116 /3 width=4 by fqup_fqus, ex3_intro/
117 | * #HG #HL #HT destruct /2 width=4 by ex3_intro/