lemma rpx_inv_lifts_bi (h) (G):
∀L1,L2,U. ⦃G,L1⦄ ⊢ ⬈[h,U] L2 → ∀b,f. 𝐔⦃f⦄ →
- 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 ≘ U → ⦃G,K1⦄ ⊢ ⬈[h,T] K2.
+ 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 ≘ U → ⦃G,K1⦄ ⊢ ⬈[h,T] K2.
/2 width=10 by rex_inv_lifts_bi/ qed-.