proposition: Lemma islabsorb_CCDRzero_CCDRmult : ∏ x : X, 0 * x = 0.
proof: Proof. now apply rigmult0x. Qed.
imports: UniMath.Algebra.DivisionRig UniMath.Algebra.Domains_and_Fields UniMath.Algebra.Apartness UniMath.MoreFoundations.Tactics