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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/static/fsle_drops.ma".
16 include "basic_2/static/fsle_fqup.ma".
17 include "basic_2/static/fsle_fsle.ma".
18 include "basic_2/static/lfxs_length.ma".
19 include "basic_2/static/lfxs_fsle.ma".
20 include "basic_2/rt_transition/cpx.ma".
22 (* UNCOUNTED CONTEXT-SENSITIVE PARALLEL RT-TRANSITION FOR TERMS *************)
24 (* Properties with context-sensitive free variables *************************)
26 (* Note: "⦃L2, T1⦄ ⊆ ⦃L0, T1⦄" may not hold *)
27 axiom cpx_lfxs_conf_fsle: ∀R,h. c_reflexive … R →
28 (∨∨ (∀G. (cpx h G) = R) | R_fsle_compatible R) →
29 ∀G,L0,T0,T1. ⦃G, L0⦄ ⊢ T0 ⬈[h] T1 →
30 ∀L2. L0 ⪤*[R, T0] L2 →
31 ∧∧ ⦃L2, T0⦄ ⊆ ⦃L0, T0⦄ & ⦃L2, T1⦄ ⊆ ⦃L2, T0⦄
32 & ⦃L0, T1⦄ ⊆ ⦃L0, T0⦄.
34 #R #h #H1R #H2R #G #L0 #T0 @(fqup_wf_ind_eq (Ⓕ) … G L0 T0) -G -L0 -T0
35 #G #L #T #IH #G0 #L0 * *
36 [ #s #HG #HL #HT #X #HX #Y #HY destruct -IH
37 lapply (lfxs_fwd_length … HY) -HY #H0
38 elim (cpx_inv_sort1 … HX) -HX #H destruct
39 /3 width=1 by fsle_sort_length, and3_intro/
40 | * [| #i ] #HG #HL #HT #X #HX #Y #HY destruct
41 [ elim (cpx_inv_zero1 … HX) -HX
43 elim (lfxs_inv_zero … HY) -HY *
44 [ #H1 #H2 destruct -IH /2 width=1 by and3_intro/
45 | #I #K0 #K2 #V0 #V2 #HK02 #HV02 #H1 #H2 destruct
46 lapply (lfxs_fwd_length … HK02) #HK
48 [ <(H2R G0) in HV02; -H2R #HV02
49 elim (IH … HV02 … HK02) /2 width=2 by fqu_fqup, fqu_lref_O/ -IH -HV02 -HK02 #H1V #H2V #_
50 /4 width=1 by fsle_trans_tc, fsle_zero_bi, and3_intro/
51 | lapply (H2R … HV02 … HK02) -H2R -HV02 -HK02 -IH #HKV20
52 /3 width=1 by fsle_zero_bi, and3_intro/
54 | #f #I #K0 #K2 #Hf #HK02 #H1 #H2 destruct
56 | * #I0 #K0 #V0 #V1 #HV01 #HV1X #H destruct
57 elim (lfxs_inv_zero_pair_sn … HY) -HY #K2 #V2 #HK02 #HV02 #H destruct
59 | elim (cpx_inv_lref1 … HX) -HX
61 elim (lfxs_inv_lref … HY) -HY *
62 [ #H0 #H1 destruct /2 width=1 by and3_intro/
63 | #I0 #I2 #K0 #K2 #HK02 #H1 #H2 destruct
64 lapply (lfxs_fwd_length … HK02) #HK
65 elim (IH … HK02) [|*: /2 width=4 by fqu_fqup/ ] -IH -HK02
66 /3 width=5 by and3_intro, fsle_lifts_SO/
68 | * #I0 #K0 #V1 #HV1 #HV1X #H0 destruct
69 elim (lfxs_inv_lref_bind_sn … HY) -HY #I2 #K2 #HK02 #H destruct
70 lapply (lfxs_fwd_length … HK02) #HK
71 elim (IH … HK02) [|*: /2 width=4 by fqu_fqup/ ] -IH -HV1 -HK02
72 /3 width=5 by fsle_lifts_SO, and3_intro/
75 | #l #HG #HL #HT #X #HX #Y #HY destruct -IH
76 lapply (lfxs_fwd_length … HY) -HY #H0
77 >(cpx_inv_gref1 … HX) -X
78 /3 width=1 by fsle_gref_length, and3_intro/
79 | #p #I #V0 #T0 #HG #HL #HT #X #HX #Y #HY destruct
80 lapply (lfxs_fwd_length … HY) #H0
81 elim (lfxs_inv_bind … V0 ? HY) -HY // #HV0 #HT0
82 elim (cpx_inv_bind1 … HX) -HX *
83 [ #V1 #T1 #HV01 #HT01 #H destruct
84 elim (IH … HV01 … HV0) -HV01 -HV0 // #H1V #H2V #H3V
85 elim (IH … HT01 … HT0) -HT01 -HT0 -IH // #H1T #H2T #H3T
86 /4 width=3 by fsle_bind_eq, fsle_fwd_pair_sn, and3_intro/
87 | #T #HT #HXT #H1 #H2 destruct
88 elim (IH G0 … V0… V0 … HV0) -HV0 // #H1V #H2V #H3V
89 elim (IH … HT … HT0) -HT -HT0 -IH // #H1T #H2T #H3T
90 /3 width=5 by fsle_bind, fsle_inv_lifts_sn, and3_intro/
92 | #I #V0 #X0 #HG #HL #HT #X #HX #Y #HY destruct
93 elim (lfxs_inv_flat … HY) -HY #HV0 #HX0
94 elim (cpx_inv_flat1 … HX) -HX *
95 [ #V1 #T1 #HV01 #HT01 #H destruct
96 elim (IH … HV01 … HV0) -HV01 -HV0 // #H1V #H2V #H3V
97 elim (IH … HT01 … HX0) -HT01 -HX0 -IH // #H1T #H2T #H3T
98 /3 width=3 by fsle_flat, and3_intro/
100 elim (IH G0 … V0… V0 … HV0) -HV0 // #H1V #H2V #H3V
101 elim (IH … HX … HX0) -HX -HX0 -IH // #H1T #H2T #H3T
102 /4 width=3 by fsle_flat_sn, fsle_flat_dx_dx, fsle_flat_dx_sn, and3_intro/
104 elim (IH … HX … HV0) -HX -HV0 // #H1V #H2V #H3V
105 elim (IH G0 … X0… X0 … HX0) -HX0 -IH // #H1T #H2T #H3T
106 /4 width=3 by fsle_flat_sn, fsle_flat_dx_dx, fsle_flat_dx_sn, and3_intro/
107 | #p #V1 #W0 #W1 #T0 #T1 #HV01 #HW01 #HT01 #H1 #H2 #H3 destruct
108 elim (lfxs_inv_bind … W0 ? HX0) -HX0 // #HW0 #HT0
109 elim (IH … HV01 … HV0) -HV01 -HV0 // #H1V #H2V #H3V
110 elim (IH … HW01 … HW0) -HW01 -HW0 // #H1W #H2W #H3W
111 elim (IH … HT01 … HT0) -HT01 -HT0 -IH // #H1T #H2T #H3T
112 lapply (fsle_fwd_pair_sn … H2T) -H2T #H2T
113 lapply (fsle_fwd_pair_sn … H3T) -H3T #H3T
114 @and3_intro [ /3 width=5 by fsle_flat, fsle_bind/ ] (**) (* full auto too slow *)
115 @fsle_bind_sn_ge /4 width=1 by fsle_shift, fsle_flat_sn, fsle_flat_dx_dx, fsle_flat_dx_sn, fsle_bind_dx_sn/
116 | #p #V1 #X1 #W0 #W1 #T0 #T1 #HV01 #HVX1 #HW01 #HT01 #H1 #H2 #H3 destruct
117 elim (lfxs_inv_bind … W0 ? HX0) -HX0 // #HW0 #HT0
118 elim (IH … HV01 … HV0) -HV01 -HV0 // #H1V #H2V #H3V
119 elim (IH … HW01 … HW0) -HW01 -HW0 // #H1W #H2W #H3W
120 elim (IH … HT01 … HT0) -HT01 -HT0 -IH // #H1T #H2T #H3T
121 lapply (fsle_fwd_pair_sn … H2T) -H2T #H2T
122 lapply (fsle_fwd_pair_sn … H3T) -H3T #H3T
123 @and3_intro[ /3 width=5 by fsle_flat, fsle_bind/ ] (**) (* full auto too slow *)
125 [1,3: /3 width=1 by fsle_flat_dx_dx, fsle_bind_dx_sn/
126 |2,4: /4 width=3 by fsle_flat_sn, fsle_flat_dx_sn, fsle_flat_dx_dx, fsle_shift, fsle_lifts_sn/