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