(* Basic_2A1: uses: lleq_lift_le lleq_lift_ge *)
lemma lfdeq_lifts_bi: ∀L1,L2. |L1| = |L2| → ∀h,o,K1,K2,T. K1 ≛[h, o, T] K2 →
- â\88\80b,f. â¬\87*[b, f] L1 â\89¡ K1 â\86\92 â¬\87*[b, f] L2 â\89¡ K2 →
- â\88\80U. â¬\86*[f] T â\89¡ U → L1 ≛[h, o, U] L2.
+ â\88\80b,f. â¬\87*[b, f] L1 â\89\98 K1 â\86\92 â¬\87*[b, f] L2 â\89\98 K2 →
+ â\88\80U. â¬\86*[f] T â\89\98 U → L1 ≛[h, o, U] L2.
/3 width=9 by lfxs_lifts_bi, tdeq_lifts_sn/ qed-.
(* Forward lemmas with length for local environments ************************)