proposition: Lemma isrinv_CFinv : ∏ (x : X) (Hx0 : x ≠ 0), x * (CFinv x Hx0) = 1.
proof: Proof. exact (isrinv_CCDRinv (X := ConstructiveField_ConstructiveCommutativeDivisionRig X)). Qed.
imports: UniMath.Algebra.DivisionRig UniMath.Algebra.Domains_and_Fields UniMath.Algebra.Apartness UniMath.MoreFoundations.Tactics