(* Advanced properties ******************************************************)
(* Basic_2A1: was: aaa_lref *)
-lemma aaa_lref_gen: ∀I,G,K,V,B,i,L. ⬇*[i] L ≡ K.ⓑ{I}V → ⦃G, K⦄ ⊢ V ⁝ B → ⦃G, L⦄ ⊢ #i ⁝ B.
+lemma aaa_lref_drops: ∀I,G,K,V,B,i,L. ⬇*[i] L ≡ K.ⓑ{I}V → ⦃G, K⦄ ⊢ V ⁝ B → ⦃G, L⦄ ⊢ #i ⁝ B.
#I #G #K #V #B #i elim i -i
[ #L #H lapply (drops_fwd_isid … H ?) -H //
#H destruct /2 width=1 by aaa_zero/
(* Advanced inversion lemmas ************************************************)
(* Basic_2A1: was: aaa_inv_lref *)
-lemma aaa_inv_lref_gen: ∀G,A,i,L. ⦃G, L⦄ ⊢ #i ⁝ A →
- ∃∃I,K,V. ⬇*[i] L ≡ K.ⓑ{I}V & ⦃G, K⦄ ⊢ V ⁝ A.
+lemma aaa_inv_lref_drops: ∀G,A,i,L. ⦃G, L⦄ ⊢ #i ⁝ A →
+ ∃∃I,K,V. ⬇*[i] L ≡ K.ⓑ{I}V & ⦃G, K⦄ ⊢ V ⁝ A.
#G #A #i elim i -i
[ #L #H elim (aaa_inv_zero … H) -H /3 width=5 by drops_refl, ex2_3_intro/
| #i #IH #L #H elim (aaa_inv_lref … H) -H
lapply (aaa_inv_sort … H) -H #H destruct
>(lifts_inv_sort1 … HX) -HX //
| #i1 #HG #HL #HT #A #H #b #f #L2 #HL21 #X #HX
- elim (aaa_inv_lref_gen … H) -H #J #K1 #V1 #HLK1 #HA
+ elim (aaa_inv_lref_drops … H) -H #J #K1 #V1 #HLK1 #HA
elim (lifts_inv_lref1 … HX) -HX #i2 #Hf #H destruct
lapply (drops_trans … HL21 … HLK1 ??) -HL21 [1,2: // ] #H
elim (drops_split_trans … H) -H [ |*: /2 width=6 by after_uni_dx/ ] #Y #HLK2 #HY
lapply (drops_inv_tls_at … Hf … HY) -HY #HY -Hf
elim (drops_inv_skip2 … HY) -HY #K2 #V2 #HK21 #HV12 #H destruct
- /4 width=12 by aaa_lref_gen, fqup_lref, drops_inv_gen/
+ /4 width=12 by aaa_lref_drops, fqup_lref, drops_inv_gen/
| #l #HG #HL #HT #A #H #b #f #L2 #HL21 #X #HX -b -f -IH
elim (aaa_inv_gref … H)
| #p * #V1 #T1 #HG #HL #HT #A #H #b #f #L2 #HL21 #X #HX
lapply (aaa_inv_sort … H) -H #H destruct
>(lifts_inv_sort2 … HX) -HX //
| #i2 #HG #HL #HT #A #H #b #f #L1 #HL21 #X #HX
- elim (aaa_inv_lref_gen … H) -H #J #K2 #V2 #HLK2 #HA
+ elim (aaa_inv_lref_drops … H) -H #J #K2 #V2 #HLK2 #HA
elim (lifts_inv_lref2 … HX) -HX #i1 #Hf #H destruct
lapply (drops_split_div … HL21 (𝐔❴i1❵) ???) -HL21 [4: * |*: // ] #Y #HLK1 #HY
lapply (drops_conf … HLK2 … HY ??) -HY [1,2: /2 width=6 by after_uni_dx/ ] #HY
lapply (drops_inv_tls_at … Hf … HY) -HY #HY -Hf
elim (drops_inv_skip1 … HY) -HY #K1 #V1 #HK21 #HV12 #H destruct
- /4 width=12 by aaa_lref_gen, fqup_lref, drops_inv_F/
+ /4 width=12 by aaa_lref_drops, fqup_lref, drops_inv_F/
| #l #HG #HL #HT #A #H #b #f #L1 #HL21 #X #HX -IH -b -f
elim (aaa_inv_gref … H)
| #p * #V2 #T2 #HG #HL #HT #A #H #b #f #L1 #HL21 #X #HX