proposition: Lemma isiso_from_Zero_to_Zero (Z Z' : Zero) : is_iso (ZeroArrowFrom Z (ZeroObject Z')).
proof: Proof. apply (is_iso_qinv _ (ZeroArrowFrom Z' (ZeroObject Z))). split; apply ArrowsFromZero. Defined.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.Limits.Graphs.Limits UniMath.CategoryTheory.Limits.Graphs.Initial UniMath.CategoryTheory.Limits.Graphs.Terminal UniMath.CategoryTheory.Limits.Zero