Definition pb_1 {C:category} {a b c:C} {f:a-->c} {g:b-->c} (pb : Pullback f g) : universalObject pb --> a := pr1 (pr1 (universalElement pb)).
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.