Definition po_eqn {C:category} {a b c:C} {f:a-->c} {g:a-->c} (po : Pushout f g) : po_1 po ∘ f = po_2 po ∘ g := pr2 (universalElement po).
Require Import UniMath.Foundations.Preamble. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.Univalence. Require Import Require Import Require Import UniMath.MoreFoundations.Tactics.