-lemma lfdeq_inv_lifts_bi: â\88\80h,o,L1,L2,U. L1 â\89¡[h, o, U] L2 → ∀b,f. 𝐔⦃f⦄ →
- â\88\80K1,K2. â¬\87*[b, f] L1 â\89¡ K1 â\86\92 â¬\87*[b, f] L2 â\89¡ K2 →
- â\88\80T. â¬\86*[f] T â\89¡ U â\86\92 K1 â\89¡[h, o, T] K2.
+lemma lfdeq_inv_lifts_bi: â\88\80h,o,L1,L2,U. L1 â\89\9b[h, o, 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 â\89\98 K2 →
+ â\88\80T. â¬\86*[f] T â\89\98 U â\86\92 K1 â\89\9b[h, o, T] K2.