| #p #G #L1 #V1 #T1 #B #A #_ #_ #IHV1 #IHT1 #X #H #L2 #HL12
elim (cpx_inv_abbr1 … H) -H *
[ #V2 #T2 #HV12 #HT12 #H destruct /4 width=2 by lpx_pair, aaa_abbr/
- | #T2 #HT12 #HT2 #H destruct -IHV1
- /4 width=8 by lpx_pair, aaa_inv_lifts, drops_refl, drops_drop/
+ | #X1 #HXT1 #HX1 #H destruct -IHV1
+ elim (cpx_lifts_sn … HX1 (Ⓣ) … (L1.ⓓV1) … HXT1) -X1
+ /4 width=7 by lpx_pair, aaa_inv_lifts, drops_refl, drops_drop/
]
| #p #G #L1 #V1 #T1 #B #A #_ #_ #IHV1 #IHT1 #X #H #L2 #HL12
elim (cpx_inv_abst1 … H) -H #V2 #T2 #HV12 #HT12 #H destruct