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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 *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
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15 include "basic_2/relocation/drops_lexs.ma".
16 include "basic_2/static/frees_drops.ma".
17 include "basic_2/static/lsubf_frees.ma".
18 include "basic_2/static/lfxs.ma".
19 include "basic_2/rt_transition/cpx_drops.ma".
21 (* UNCOUNTED PARALLEL RT-TRANSITION FOR LOCAL ENV.S ON REFERRED ENTRIES *****)
23 (* Properties with context-sensitive free variables *************************)
25 axiom frees_pair_flat: ∀L,T,f1,I1,V1. L.ⓑ{I1}V1 ⊢ 𝐅*⦃T⦄ ≡ f1 →
26 ∀f2,I2,V2. L.ⓑ{I2}V2 ⊢ 𝐅*⦃T⦄ ≡ f2 →
28 ∀I0,I. L.ⓑ{I0}ⓕ{I}V1.V2 ⊢ 𝐅*⦃T⦄ ≡ f0.
30 (* Basic_2A1: was: lpx_cpx_frees_trans *)
31 lemma cpx_frees_conf_lfpx: ∀h,G,L1,T1,f1. L1 ⊢ 𝐅*⦃T1⦄ ≡ f1 →
32 ∀L2. L1 ⦻*[cpx h G, cfull, f1] L2 →
33 ∀T2. ⦃G, L1⦄ ⊢ T1 ⬈[h] T2 →
34 ∃∃f2. L2 ⊢ 𝐅*⦃T2⦄ ≡ f2 & f2 ⊆ f1.
35 #h #G #L1 #T1 @(fqup_wf_ind_eq … G L1 T1) -G -L1 -T1
36 #G0 #L0 #U0 #IH #G #L1 * *
37 [ -IH #s #HG #HL #HU #g1 #H1 #L2 #_ #U2 #H0 destruct
38 lapply (frees_inv_sort … H1) -H1 #Hg1
39 elim (cpx_inv_sort1 … H0) -H0 #H destruct
40 /3 width=3 by frees_sort_gen, sle_refl, ex2_intro/
41 | #i #HG #HL #HU #g1 #H1 #L2 #H2 #U2 #H0 destruct
42 elim (frees_inv_lref_drops … H1) -H1 *
44 elim (cpx_inv_lref1_drops … H0) -H0
46 /5 width=9 by frees_lref_atom, drops_atom2_lexs_conf, coafter_isuni_isid, sle_refl, ex2_intro/
47 | * -H2 -Hg1 #I #K1 #V1 #V2 #HLK1
48 lapply (drops_TF … HLK1) -HLK1 #HLK1
49 lapply (drops_mono … HLK1 … HL1) -L1 #H destruct
51 | #f1 #I #K1 #V1 #Hf1 #HLK1 #H destruct
52 elim (cpx_inv_lref1_drops … H0) -H0
54 elim (lexs_drops_conf_next … H2 … HLK1) -H2 [ |*: // ] #K2 #V2 #HLK2 #HK12 #HV12
55 elim (IH … Hf1 … HK12 … HV12) /2 width=2 by fqup_lref/ -L1 -K1 -V1 #f2 #Hf2 #Hf21
56 /4 width=7 by frees_lref_pushs, frees_lref_pair, drops_refl, sle_next, ex2_intro, sle_pushs/
57 | * #J #Y #X #V2 #H #HV12 #HVU2
58 lapply (drops_mono … H … HLK1) -H #H destruct
59 elim (lexs_drops_conf_next … H2 … HLK1) -H2 [ |*: // ] #K2 #V0 #HLK2 #HK12 #_
60 lapply (drops_isuni_fwd_drop2 … HLK2) // -V0 #HLK2
61 elim (IH … Hf1 … HK12 … HV12) /2 width=2 by fqup_lref/ -I -L1 -K1 -V1 #f2 #Hf2 #Hf21
62 lapply (frees_lifts … Hf2 … HLK2 … HVU2 ??) /4 width=7 by sle_weak, ex2_intro, sle_pushs/
65 | -IH #l #HG #HL #HU #g1 #H1 #L2 #_ #U2 #H0 destruct
66 lapply (frees_inv_gref … H1) -H1 #Hg1
67 lapply (cpx_inv_gref1 … H0) -H0 #H destruct
68 /3 width=3 by frees_gref_gen, sle_refl, ex2_intro/
69 | #p #I #V1 #T1 #HG #HL #HU #g1 #H1 #L2 #H2 #U2 #H0 destruct
70 elim (frees_inv_bind … H1) -H1 #gV1 #gT1 #HgV1 #HgT1 #Hg1
71 elim (cpx_inv_bind1 … H0) -H0 *
72 [ #V2 #T2 #HV12 #HT12 #H destruct
73 lapply (sle_lexs_trans … H2 gV1 ?) /2 width=2 by sor_inv_sle_sn/ #HL12V
74 lapply (sle_lexs_trans … H2 (⫱gT1) ?) /2 width=2 by sor_inv_sle_dx/ -H2 #HL12T
75 lapply (lexs_inv_tl … I … HL12T … HV12 ?) // -HL12T #HL12T
76 elim (IH … HgV1 … HL12V … HV12) // -HgV1 -HL12V -HV12 #gV2 #HgV2 #HgV21
77 elim (IH … HgT1 … HL12T … HT12) // -IH -HgT1 -HL12T -HT12 #gT2 #HgT2 #HgT21
78 elim (sor_isfin_ex gV2 (⫱gT2)) /3 width=3 by frees_fwd_isfin, isfin_tl/
79 /4 width=10 by frees_bind, monotonic_sle_sor, sle_tl, ex2_intro/
80 | #T2 #HT12 #HUT2 #H0 #H1 destruct -HgV1
81 lapply (sle_lexs_trans … H2 (⫱gT1) ?) /2 width=2 by sor_inv_sle_dx/ -H2 #HL12T
82 lapply (lexs_inv_tl … Abbr … V1 V1 HL12T ??) // -HL12T #HL12T
83 elim (IH … HgT1 … HL12T … HT12) // -L1 -T1 #gT2 #HgT2 #HgT21
84 lapply (frees_inv_lifts_SO (Ⓣ) … HgT2 … L2 … HUT2) [ /3 width=1 by drops_refl, drops_drop/ ] -V1 -T2
85 /5 width=6 by sor_inv_sle_dx, sle_trans, sle_tl, ex2_intro/
87 | #I #V1 #T0 #HG #HL #HU #g1 #H1 #L2 #H2 #U2 #H0 destruct
88 elim (frees_inv_flat … H1) -H1 #gV1 #gT0 #HgV1 #HgT0 #Hg1
89 elim (cpx_inv_flat1 … H0) -H0 *
90 [ #V2 #T2 #HV12 #HT12 #H destruct
91 lapply (sle_lexs_trans … H2 gV1 ?) /2 width=2 by sor_inv_sle_sn/ #HL12V
92 lapply (sle_lexs_trans … H2 gT0 ?) /2 width=2 by sor_inv_sle_dx/ -H2 #HL12T
93 elim (IH … HgV1 … HL12V … HV12) // -HgV1 -HL12V -HV12 #gV2 #HgV2 #HgV21
94 elim (IH … HgT0 … HL12T … HT12) // -IH -HgT0 -HL12T -HT12 #gT2 #HgT2 #HgT21
95 elim (sor_isfin_ex gV2 gT2) /2 width=3 by frees_fwd_isfin/
96 /3 width=10 by frees_flat, monotonic_sle_sor, ex2_intro/
97 | #HU2 #H destruct -HgV1
98 lapply (sle_lexs_trans … H2 gT0 ?) /2 width=2 by sor_inv_sle_dx/ -H2 #HL12T
99 elim (IH … HgT0 … HL12T … HU2) // -L1 -T0 -V1
100 /4 width=6 by sor_inv_sle_dx, sle_trans, ex2_intro/
101 | #HU2 #H destruct -HgT0
102 lapply (sle_lexs_trans … H2 gV1 ?) /2 width=2 by sor_inv_sle_sn/ -H2 #HL12V
103 elim (IH … HgV1 … HL12V … HU2) // -L1 -T0 -V1
104 /4 width=6 by sor_inv_sle_sn, sle_trans, ex2_intro/
105 | #p #V2 #W1 #W2 #T1 #T2 #HV12 #HW12 #HT12 #H0 #H1 #H destruct
106 elim (frees_inv_bind … HgT0) -HgT0 #gW1 #gT1 #HgW1 #HgT1 #HgT0
107 lapply (sle_lexs_trans … H2 gV1 ?) /2 width=2 by sor_inv_sle_sn/ #HL12V
108 lapply (sle_lexs_trans … H2 gT0 ?) /2 width=2 by sor_inv_sle_dx/ -H2 #H2
109 lapply (sle_lexs_trans … H2 gW1 ?) /2 width=2 by sor_inv_sle_sn/ #HL12W
110 lapply (sle_lexs_trans … H2 (⫱gT1) ?) /2 width=2 by sor_inv_sle_dx/ -H2 #HL12T
111 lapply (lexs_inv_tl … Abst … HL12T … HW12 ?) // -HL12T #HL12T
112 elim (sor_isfin_ex gV1 gW1) /2 width=3 by frees_fwd_isfin/ #g0 #Hg0 #_
113 lapply (sor_trans2 … Hg1 … HgT0 … Hg0) -Hg1 -HgT0 #Hg1
114 lapply (sor_sym … Hg0) -Hg0 #Hg0
115 elim (IH … HgV1 … HL12V … HV12) // -HgV1 -HL12V -HV12 #gV2 #HgV2 #HgV21
116 elim (IH … HgW1 … HL12W … HW12) // -HgW1 -HL12W -HW12 #gW2 #HgW2 #HgW21
117 elim (IH … HgT1 … HL12T … HT12) // -IH -HgT1 -HL12T -HT12 #gT2 #HgT2 #HgT21
118 elim (sor_isfin_ex gV2 (⫱gT2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #gVT2 #HgVT2 #_
119 elim (lsubf_frees_trans … HgT2 (⫯gVT2) … (L2.ⓓⓝW2.V2))
120 [2: /4 width=4 by lsubf_refl, lsubf_beta, sor_inv_sle_dx, sor_inv_sle_sn, sle_inv_tl_sn/ ]
121 -HgT2 #gT0 #HgT0 #HgT20
122 elim (sor_isfin_ex gW2 gV2) /2 width=3 by frees_fwd_isfin/ #gV0 #HgV0 #H
123 elim (sor_isfin_ex gV0 (⫱gT0)) /3 width=3 by frees_fwd_isfin, isfin_tl/ -H #g2 #Hg2 #_
125 [ @(frees_bind … Hg2) /2 width=5 by frees_flat/
126 | -L2 @(sor_inv_sle … Hg2) -Hg2
127 [ /3 width=11 by sor_inv_sle_sn_trans, monotonic_sle_sor/
128 | @sle_xn_tl [2:|*: // ] @(sle_trans … HgT20) -HgT20
129 /4 width=8 by monotonic_sle_sor, sor_inv_sle_dx_trans, sle_tl, sle_next/
130 ] (**) (* full auto too slow *)
132 | #p #V2 #V #W1 #W2 #T1 #T2 #HV12 #HV2 #HW12 #HT12 #H0 #H1 #H destruct
133 elim (frees_inv_bind … HgT0) -HgT0 #gW1 #gT1 #HgW1 #HgT1 #HgT0
134 lapply (sle_lexs_trans … H2 gV1 ?) /2 width=2 by sor_inv_sle_sn/ #HL12V
135 lapply (sle_lexs_trans … H2 gT0 ?) /2 width=2 by sor_inv_sle_dx/ -H2 #H2
136 lapply (sle_lexs_trans … H2 gW1 ?) /2 width=2 by sor_inv_sle_sn/ #HL12W
137 lapply (sle_lexs_trans … H2 (⫱gT1) ?) /2 width=2 by sor_inv_sle_dx/ -H2 #HL12T
138 lapply (lexs_inv_tl … Abbr … HL12T … HW12 ?) // -HL12T #HL12T
139 elim (sor_isfin_ex gV1 gW1) /2 width=3 by frees_fwd_isfin/ #g0 #Hg0 #_
140 lapply (sor_trans2 … Hg1 … HgT0 … Hg0) -Hg1 -HgT0 #Hg1
141 elim (IH … HgV1 … HL12V … HV12) // -HgV1 -HL12V -HV12 #gV2 #HgV2 #HgV21
142 elim (IH … HgW1 … HL12W … HW12) // -HgW1 -HL12W -HW12 #gW2 #HgW2 #HgW21
143 elim (IH … HgT1 … HL12T … HT12) // -IH -HgT1 -HL12T -HT12 #gT2 #HgT2 #HgT21
144 elim (sor_isfin_ex (↑gV2) gT2) /3 width=3 by frees_fwd_isfin, isfin_push/ #gV0 #HgV0 #H
145 elim (sor_isfin_ex gW2 (⫱gV0)) /3 width=3 by frees_fwd_isfin, isfin_tl/ -H #g2 #Hg2 #_
146 elim (sor_isfin_ex gW2 gV2) /2 width=3 by frees_fwd_isfin/ #g #Hg #_
147 lapply (sor_trans2 … Hg2 … (⫱gT2) … Hg) /2 width=1 by sor_tl/ #Hg2
148 lapply (frees_lifts (Ⓣ) … HgV2 … (L2.ⓓW2) … HV2 ??)
149 [4: lapply (sor_sym … Hg) |*: /3 width=3 by drops_refl, drops_drop/ ] -V2 (**) (* full auto too slow *)
150 /4 width=10 by frees_flat, frees_bind, monotonic_sle_sor, sle_tl, ex2_intro/
155 (* Basic_2A1: was: cpx_frees_trans *)
156 lemma cpx_frees_conf: ∀h,G. R_frees_confluent (cpx h G).
157 /3 width=7 by cpx_frees_conf_lfpx, lexs_refl/ qed-.
159 (* Basic_2A1: was: lpx_frees_trans *)
160 lemma lfpx_frees_conf: ∀h,G. lexs_frees_confluent (cpx h G) cfull.
161 /2 width=7 by cpx_frees_conf_lfpx/ qed-.