proposition: Lemma isassoc_CDRmult : ∏ x y z : X, x * y * z = x * (y * z).
proof: Proof. now apply rigassoc2. Qed.
imports: UniMath.Algebra.DivisionRig UniMath.Algebra.Domains_and_Fields UniMath.Algebra.Apartness UniMath.MoreFoundations.Tactics