fact: Definition z_iso_Zeros (Z Z' : Zero) : z_iso Z Z' := tpair _ (ZeroArrowTo Z' Z) (isziso_from_Zero_to_Zero Z' Z).
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.Limits.Initial UniMath.CategoryTheory.Limits.Terminal