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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 "static_2/static/fsle_drops.ma".
16 include "static_2/static/rex_fsle.ma".
17 include "basic_2/rt_transition/rpx_length.ma".
18 include "basic_2/rt_transition/rpx_drops.ma".
19 include "basic_2/rt_transition/rpx_fqup.ma".
21 (* UNBOUND PARALLEL RT-TRANSITION FOR REFERRED LOCAL ENVIRONMENTS ***********)
23 (* Forward lemmas with free variables inclusion for restricted closures *****)
25 (* Note: "❪L2, T1❫ ⊆ ❪L2, T0❫" does not hold *)
26 (* Note: Take L0 = K0.ⓓ(ⓝW.V), L2 = K0.ⓓW, T0 = #0, T1 = ⇧[1]V *)
27 (* Note: This invalidates rpxs_cpx_conf: "∀G. s_r_confluent1 … (cpx G) (rpxs G)" *)
28 lemma rpx_cpx_conf_fsge (G):
29 ∀L0,T0,T1. ❪G,L0❫ ⊢ T0 ⬈ T1 →
30 ∀L2. ❪G,L0❫ ⊢⬈[T0] L2 → ❪L2,T1❫ ⊆ ❪L0,T0❫.
31 #G0 #L0 #T0 @(fqup_wf_ind_eq (Ⓣ) … G0 L0 T0) -G0 -L0 -T0
32 #G #L #T #IH #G0 #L0 * *
33 [ #s0 #HG #HL #HT #X #HX #Y #HY destruct -IH
34 elim (cpx_inv_sort1 … HX) -HX #s1 #H destruct
35 lapply (rpx_fwd_length … HY) -HY #H0
36 /2 width=1 by fsle_sort_bi/
37 | * [| #i ] #HG #HL #HT #X #HX #Y #HY destruct
38 [ elim (cpx_inv_zero1 … HX) -HX
40 elim (rpx_inv_zero_length … HY) -HY *
41 [ #H1 #H2 destruct -IH //
42 | #I #K0 #K2 #V0 #V2 #HK02 #HV02 #H1 #H2 destruct
43 lapply (rpx_fwd_length … HK02) #H0
44 /4 width=4 by fsle_pair_bi, fqu_fqup, fqu_lref_O/
45 | #I #K0 #K2 #HK02 #H1 #H2 destruct -IH
46 /2 width=1 by fsle_unit_bi/
48 | * #I0 #K0 #V0 #V1 #HV01 #HV1X #H destruct
49 elim (rpx_inv_zero_pair_sn … HY) -HY #K2 #V2 #HK02 #HV02 #H destruct
50 lapply (rpx_fwd_length … HK02) #H0
51 /4 width=4 by fsle_lifts_SO_sn, fqu_fqup, fqu_lref_O/
53 | elim (cpx_inv_lref1 … HX) -HX
55 elim (rpx_inv_lref … HY) -HY *
57 | #I0 #I2 #K0 #K2 #HK02 #H1 #H2 destruct
58 lapply (rpx_fwd_length … HK02) #H0
59 /4 width=5 by fsle_lifts_SO, fqu_fqup/
61 | * #I0 #K0 #V1 #HV1 #HV1X #H0 destruct
62 elim (rpx_inv_lref_bind_sn … HY) -HY #I2 #K2 #HK02 #H destruct
63 lapply (rpx_fwd_length … HK02) #H0
64 /4 width=5 by fsle_lifts_SO, fqu_fqup/
67 | #l #HG #HL #HT #X #HX #Y #HY destruct -IH
68 >(cpx_inv_gref1 … HX) -X
69 lapply (rpx_fwd_length … HY) -HY #H0
70 /2 width=1 by fsle_gref_bi/
71 | #p #I #V0 #T0 #HG #HL #HT #X #HX #Y #HY destruct
72 elim (rpx_inv_bind … V0 ? HY) -HY #HV0 #HT0
73 elim (cpx_inv_bind1 … HX) -HX *
74 [ #V1 #T1 #HV01 #HT01 #H destruct
75 lapply (rpx_fwd_length … HV0) #H0
76 /4 width=6 by fsle_bind_eq, fsle_fwd_pair_sn/
77 | #T #H2T0 #HTX #H1 #H2 destruct
78 lapply (rpx_inv_lifts_bi … HT0 (Ⓣ) … H2T0) -HT0 [6:|*: /3 width=2 by drops_refl, drops_drop/ ] #HT
79 lapply (rpx_fwd_length … HV0) #H0
80 /5 width=6 by fsle_bind_dx_dx, fsle_lifts_dx, fqup_zeta/
82 | #I #V0 #X0 #HG #HL #HT #X #HX #Y #HY destruct
83 elim (rex_inv_flat … HY) -HY #HV0 #HX0
84 elim (cpx_inv_flat1 … HX) -HX *
85 [ #V1 #T1 #HV01 #HT01 #H destruct
86 /3 width=4 by fsle_flat/
88 /4 width=4 by fsle_flat_dx_dx/
90 /4 width=4 by fsle_flat_dx_sn/
91 | #p #V1 #W0 #W1 #T0 #T1 #HV01 #HW01 #HT01 #H1 #H2 #H3 destruct
92 elim (rpx_inv_bind … W0 ? HX0) -HX0 #HW0 #HT0
93 lapply (rpx_fwd_length … HV0) #H0
94 lapply (IH … HV01 … HV0) -HV01 -HV0 // #HV
95 lapply (IH … HW01 … HW0) -HW01 -HW0 // #HW
96 lapply (IH … HT01 … HT0) -HT01 -HT0 -IH // #HT
97 lapply (fsle_fwd_pair_sn … HT) -HT #HT
99 [ /4 width=1 by fsle_flat_sn, fsle_flat_dx_dx, fsle_flat_dx_sn, fsle_bind_dx_sn/
100 | /3 width=1 by fsle_flat_dx_dx, fsle_shift/
102 | #p #V1 #X1 #W0 #W1 #T0 #T1 #HV01 #HVX1 #HW01 #HT01 #H1 #H2 #H3 destruct
103 elim (rpx_inv_bind … W0 ? HX0) -HX0 #HW0 #HT0
104 lapply (rpx_fwd_length … HV0) #H0
105 lapply (IH … HV01 … HV0) -HV01 -HV0 // #HV
106 lapply (IH … HW01 … HW0) -HW01 -HW0 // #HW
107 lapply (IH … HT01 … HT0) -HT01 -HT0 -IH // #HT
108 lapply (fsle_fwd_pair_sn … HT) -HT #HT
110 [ /3 width=1 by fsle_flat_dx_dx, fsle_bind_dx_sn/
111 | /4 width=3 by fsle_flat_sn, fsle_flat_dx_sn, fsle_flat_dx_dx, fsle_shift, fsle_lifts_sn/
117 lemma rpx_fsge_comp (G): rex_fsge_compatible (cpx G).
118 /2 width=4 by rpx_cpx_conf_fsge/ qed-.
120 (**) (* this section concerns cpx *)
121 (* Properties with generic extension on referred entries ********************)
123 (* Basic_2A1: uses: cpx_frees_trans *)
124 lemma cpx_fsge_comp (G): R_fsge_compatible (cpx G).
125 /2 width=4 by rpx_cpx_conf_fsge/ qed-.
127 (* Note: lemma 1000 *)
128 (* Basic_2A1: uses: cpx_llpx_sn_conf *)
129 lemma cpx_rex_conf_sn (R) (G): s_r_confluent1 … (cpx G) (rex R).
130 /3 width=3 by fsge_rex_trans, cpx_fsge_comp/ qed-.
132 (* Advanced properties ******************************************************)
134 lemma rpx_cpx_conf_sn (G): s_r_confluent1 … (cpx G) (rpx G).
135 /2 width=5 by cpx_rex_conf_sn/ qed-.
137 lemma rpx_cpx_conf_fsge_dx (G):
138 ∀L0,T0,T1. ❪G,L0❫ ⊢ T0 ⬈ T1 →
139 ∀L2. ❪G,L0❫ ⊢⬈[T0] L2 → ❪L2,T1❫ ⊆ ❪L0,T1❫.
140 /3 width=5 by rpx_cpx_conf_sn, rpx_fsge_comp/ qed-.