proposition: Lemma isirrefl_CFap : ∏ x : X, ¬ (x ≠ x).
proof: Proof. exact (isirrefl_CCDRap (X := ConstructiveField_ConstructiveCommutativeDivisionRig X)). Qed.
imports: UniMath.Algebra.DivisionRig UniMath.Algebra.Domains_and_Fields UniMath.Algebra.Apartness UniMath.MoreFoundations.Tactics