proposition: Lemma isziso_from_Pushout_to_Pushout {a b c : C} {f : a --> b} {g : a --> c} (Pb Pb': Pushout f g) : is_z_isomorphism (from_Pushout_to_Pushout Pb Pb').
proof: Proof. exists (from_Pushout_to_Pushout Pb' Pb). apply are_inverses_from_Pushout_to_Pushout. Defined.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.TransportMorphisms UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Limits.Initial UniMath.CategoryTheory.Limits.BinCoproducts UniMath.CategoryTheory.Limits.Coequalizers UniMath.CategoryTheory.Epis UniMath.CategoryTheory.Core.Functors