proposition: Lemma commring_iso_equiv (X Y : ob commring_category) : z_iso X Y -> ringiso (X : commring) (Y : commring).
proof: Proof. intro f. use make_ringiso. - exact (make_weq (pr1 (pr1 f)) (commring_iso_is_equiv X Y f)). - exact (pr2 (pr1 f)). Defined.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.Foundations.UnivalenceAxiom UniMath.Algebra.BinaryOperations UniMath.Algebra.Monoids UniMath.Algebra.RigsAndRings UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence