/2 width=5 by rex_dropable_dx/ qed-.
lemma rpx_inv_lifts_bi (h) (G):
- â\88\80L1,L2,U. â¦\83G,L1â¦\84 â\8a¢ â¬\88[h,U] L2 â\86\92 â\88\80b,f. ð\9d\90\94â¦\83fâ¦\84 →
- â\88\80K1,K2. â¬\87*[b,f] L1 â\89\98 K1 â\86\92 â¬\87*[b,f] L2 ≘ K2 →
- â\88\80T. â¬\86*[f]T â\89\98 U â\86\92 â¦\83G,K1â¦\84 ⊢ ⬈[h,T] K2.
+ â\88\80L1,L2,U. â\9dªG,L1â\9d« â\8a¢ â¬\88[h,U] L2 â\86\92 â\88\80b,f. ð\9d\90\94â\9dªfâ\9d« →
+ â\88\80K1,K2. â\87©*[b,f] L1 â\89\98 K1 â\86\92 â\87©*[b,f] L2 ≘ K2 →
+ â\88\80T. â\87§*[f]T â\89\98 U â\86\92 â\9dªG,K1â\9d« ⊢ ⬈[h,T] K2.
/2 width=10 by rex_inv_lifts_bi/ qed-.