proposition: Lemma seq_wmax_rt r r' b (MAX: wmax_elt r' b) (COD: forall x y, r x y -> y = b) : r⨾ r' ＊ ≡ r.
proof: Proof. rewrite rtE; split; relsf; rewrite seq_wmax_t; relsf. Qed.
imports: HahnBase HahnList HahnSets HahnRelationsBasic HahnEquational HahnRewrite Arith Setoid