(* Note: the premise đâŚf⌠cannot be removed *)
(* Basic_2A1: includes: lsuba_drop_O1_trans *)
lemma lsuba_drops_trans_isuni: âG,L1,L2. G ⢠L1 âŤâ L2 â
(* Note: the premise đâŚf⌠cannot be removed *)
(* Basic_2A1: includes: lsuba_drop_O1_trans *)
lemma lsuba_drops_trans_isuni: âG,L1,L2. G ⢠L1 âŤâ L2 â