Definition stable_from_pb_preserves_bincoproduct_z_iso : z_iso pb (BC ap bp). Proof. use make_z_iso. - exact stable_from_pb_preserves_bincoproduct_mor. - exact stable_from_pb_preserves_bincoproduct_inv. - exact stable_from_pb_preserves_bincoproduct_inverses. Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Prelude. Require Import UniMath.CategoryTheory.Monics. Require Import UniMath.CategoryTheory.DisplayedCats.Codomain. Require Import UniMath.CategoryTheory.DisplayedCats.Codomain.FiberCod. Require Import UniMath.CategoryTheory.DisplayedCats.Codomain.CodColimits. Require Import UniMath.CategoryTheory.Limits.Initial. Require Import UniMath.CategoryTheory.Limits.BinCoproducts. Require Import UniMath.CategoryTheory.Limits.Pullbacks. Require Import UniMath.CategoryTheory.Limits.Preservation. Section FromStable. End FromStable.