1 (**************************************************************************)
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 *)
13 (**************************************************************************)
15 include "Basic_2/unfold/lifts_lifts.ma".
16 include "Basic_2/unfold/ldrops_ldrops.ma".
17 include "Basic_2/static/aaa.ma".
18 include "Basic_2/computation/lsubc.ma".
20 (* NOTE: The constant (0) can not be generalized *)
21 axiom lsubc_ldrop_trans: ∀RP,L1,L2. L1 [RP] ⊑ L2 → ∀K2,e. ⇩[0, e] L2 ≡ K2 →
22 ∃∃K1. ⇩[0, e] L1 ≡ K1 & K1 [RP] ⊑ K2.
24 axiom ldrops_lsubc_trans: ∀RP,L1,K1,des. ⇩*[des] L1 ≡ K1 → ∀K2. K1 [RP] ⊑ K2 →
25 ∃∃L2. L1 [RP] ⊑ L2 & ⇩*[des] L2 ≡ K2.
27 (* ABSTRACT COMPUTATION PROPERTIES ******************************************)
29 (* Main propertis ***********************************************************)
31 axiom aacr_aaa_csubc_lifts: ∀RR,RS,RP.
32 acp RR RS RP → acr RR RS RP (λL,T. RP L T) →
33 ∀L1,T,A. L1 ⊢ T ÷ A → ∀L0,des. ⇩*[des] L0 ≡ L1 →
34 ∀T0. ⇧*[des] T ≡ T0 → ∀L2. L2 [RP] ⊑ L0 →
37 #RR #RS #RP #H1RP #H2RP #L1 #T #A #H elim H -L1 -T -A
38 [ #L #k #L0 #des #HL0 #X #H #L2 #HL20
39 >(lifts_inv_sort1 … H) -H
40 lapply (aacr_acr … H1RP H2RP 𝕒) #HAtom
41 @(s2 … HAtom … ◊) // /2 width=2/
42 | * #L #K #V #B #i #HLK #_ #IHB #L0 #des #HL0 #X #H #L2 #HL20
43 elim (lifts_inv_lref1 … H) -H #i0 #Hi0 #H destruct
44 elim (ldrops_ldrop_trans … HL0 … HLK) -L #L #des1 #i1 #HL0 #HLK #Hi1 #Hdes1
46 elim (lsubc_ldrop_trans … HL20 … HL0) -L0 #L0 #HL20 #HL0
48 | lapply (aacr_acr … H1RP H2RP B) #HB
53 | #L #V #T #B #A #_ #_ #IHB #IHA #L0 #des #HL0 #X #H #L2 #HL20
54 elim (lifts_inv_bind1 … H) -H #V0 #T0 #HV0 #HT0 #H destruct
55 lapply (aacr_acr … H1RP H2RP A) #HA
56 lapply (aacr_acr … H1RP H2RP B) #HB
57 lapply (s1 … HB) -HB #HB
58 @(s5 … HA … ◊ ◊) // /3 width=5/
59 | #L #W #T #B #A #_ #_ #IHB #IHA #L0 #des #HL0 #X #H #L2 #HL02
60 elim (lifts_inv_bind1 … H) -H #W0 #T0 #HW0 #HT0 #H destruct
61 @(aacr_abst … H1RP H2RP)
62 [ lapply (aacr_acr … H1RP H2RP B) #HB
63 @(s1 … HB) /2 width=5/
64 | #L3 #V3 #T3 #des3 #HL32 #HT03 #HB
65 elim (lifts_total des3 W0) #W2 #HW02
66 elim (ldrops_lsubc_trans … HL32 … HL02) -L2 #L2 #HL32 #HL20
67 @(IHA (L2. 𝕓{Abst} W2) … (ss des @ ss des3))
68 /2 width=3/ /3 width=5/ /4 width=6/
70 | #L #V #T #B #A #_ #_ #IHB #IHA #L0 #des #HL0 #X #H #L2 #HL20
71 elim (lifts_inv_flat1 … H) -H #V0 #T0 #HV0 #HT0 #H destruct
73 | #L #V #T #A #_ #_ #IH1A #IH2A #L0 #des #HL0 #X #H #L2 #HL20
74 elim (lifts_inv_flat1 … H) -H #V0 #T0 #HV0 #HT0 #H destruct
75 lapply (aacr_acr … H1RP H2RP A) #HA
77 @(s6 … HA … ◊) /2 width=5/ /3 width=5/
80 lemma acp_aaa: ∀RR,RS,RP. acp RR RS RP → acr RR RS RP (λL,T. RP L T) →
81 ∀L,T,A. L ⊢ T ÷ A → RP L T.
82 #RR #RS #RP #H1RP #H2RP #L #T #A #HT
83 lapply (aacr_acr … H1RP H2RP A) #HA
84 @(s1 … HA) /2 width=8/