-lemma lfpx_fwd_pair_sn: ∀h,I,G,L1,L2,V,T.
- ⦃G, L1⦄ ⊢ ⬈[h, ②{I}V.T] L2 → ⦃G, L1⦄ ⊢ ⬈[h, V] L2.
-/2 width=3 by lfxs_fwd_pair_sn/ qed-.
-
-(* Basic_2A1: removed theorems 14:
- lpx_refl lpx_pair lpx_fwd_length
- lpx_inv_atom1 lpx_inv_pair1 lpx_inv_atom2 lpx_inv_pair2 lpx_inv_pair
- lpx_drop_conf drop_lpx_trans lpx_drop_trans_O1
- lpx_cpx_frees_trans cpx_frees_trans lpx_frees_trans