proposition: Lemma issymm_CFap : ∏ x y : X, x ≠ y -> y ≠ x.
proof: Proof. exact (issymm_CCDRap (X := ConstructiveField_ConstructiveCommutativeDivisionRig X)). Qed.
imports: UniMath.Algebra.DivisionRig UniMath.Algebra.Domains_and_Fields UniMath.Algebra.Apartness UniMath.MoreFoundations.Tactics