-lemma lfpr_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 16:
- lpr_inv_atom1 lpr_inv_pair1 lpr_inv_atom2 lpr_inv_pair2
- lpr_refl lpr_pair
- lpr_fwd_length lpr_lpx
- lpr_drop_conf drop_lpr_trans lpr_drop_trans_O1