(* Basic_1: was: sc3_arity_csubc *)
theorem acr_aaa_csubc_lifts: ∀RR,RS,RP.
gcp RR RS RP → gcr RR RS RP RP →
- â\88\80G,L1,T,A. â¦\83G, L1â¦\84 â\8a¢ T â\81\9d A â\86\92 â\88\80L0,des. â\87©*[Ⓕ, des] L0 ≡ L1 →
- â\88\80T0. â\87§*[des] T ≡ T0 → ∀L2. G ⊢ L2 ⫃[RP] L0 →
+ â\88\80G,L1,T,A. â¦\83G, L1â¦\84 â\8a¢ T â\81\9d A â\86\92 â\88\80L0,des. â¬\87*[Ⓕ, des] L0 ≡ L1 →
+ â\88\80T0. â¬\86*[des] T ≡ T0 → ∀L2. G ⊢ L2 ⫃[RP] L0 →
⦃G, L2, T0⦄ ϵ[RP] 〚A〛.
#RR #RS #RP #H1RP #H2RP #G #L1 #T #A #H elim H -G -L1 -T -A
[ #G #L #k #L0 #des #HL0 #X #H #L2 #HL20
lapply (aaa_mono … H2KV0A … HKV0B) #H destruct -H2KV0A -HKV0B
elim (lift_total V0 0 (i0 +1)) #V3 #HV03
elim (lift_total V2 0 (i0 +1)) #V #HV2
- lapply (s5 … HB ? G ? ? (◊) … (ⓝV3.V) … HLK2) [1,3: /2 width=1 by lift_flat/ ]
- lapply (s7 … HB G L2 (◊)) #H @H -H [ @(s0 … HB … HKV2A) // | @(s0 … HB … H1KV0A) // ]
+ lapply (s5 … HB ? G ? ? (◊) … (ⓝV3.V) … HLK2) /2 width=1 by lift_flat/
+ lapply (s7 … HB G L2 (◊)) /3 width=7 by gcr_lift/
]
| #a #G #L #V #T #B #A #_ #_ #IHB #IHA #L0 #des #HL0 #X #H #L2 #HL20
elim (lifts_inv_bind1 … H) -H #V0 #T0 #HV0 #HT0 #H destruct
lapply (s6 … HA G L2 (◊) (◊)) /4 width=5 by lsubc_pair, drops_skip, liftv_nil/
| #a #G #L #W #T #B #A #HLWB #_ #IHB #IHA #L0 #des #HL0 #X #H #L2 #HL02
elim (lifts_inv_bind1 … H) -H #W0 #T0 #HW0 #HT0 #H destruct
- @(acr_abst … H1RP H2RP) [ /2 width=5 by/ ]
+ @(acr_abst … H1RP H2RP) /2 width=5 by/
#L3 #V3 #W3 #T3 #des3 #HL32 #HW03 #HT03 #H1B #H2B
- elim (drops_lsubc_trans … H1RP H2RP … HL32 … HL02) -L2 #L2 #HL32 #HL20
+ elim (drops_lsubc_trans … H1RP … HL32 … HL02) -L2 #L2 #HL32 #HL20
lapply (aaa_lifts … L2 W3 … (des @@ des3) … HLWB) -HLWB /2 width=4 by drops_trans, lifts_trans/ #HLW2B
@(IHA (L2. ⓛW3) … (des + 1 @@ des3 + 1)) -IHA
/3 width=5 by lsubc_beta, drops_trans, drops_skip, lifts_trans/