proposition: Lemma isnonzeroCF : (1 : X) ≠ (0 : X).
proof: Proof. exact (isnonzeroCCDR (X := ConstructiveField_ConstructiveCommutativeDivisionRig X)). Qed.
imports: UniMath.Algebra.DivisionRig UniMath.Algebra.Domains_and_Fields UniMath.Algebra.Apartness UniMath.MoreFoundations.Tactics