proposition: Lemma isiso_from_Pushout_to_Pushout {a b c : C} {f : C⟦a, b⟧} {g : C⟦a, c⟧} (Po Po': Pushout f g) : is_iso (from_Pushout_to_Pushout Po Po').
proof: Proof. apply (is_iso_qinv _ (from_Pushout_to_Pushout Po' Po)). apply are_inverses_from_Pushout_to_Pushout. Defined.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.Combinatorics.StandardFiniteSets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Limits.Graphs.Limits UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.Limits.Pushouts