Definition weq_binprod_to_pullback : weq (some_binprod (C / Z)) (some_pullback C Z) := binprod_to_pullback ,, isweq_binprod_to_pullback.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.Foundations.Sets. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.slicecat. Require Import UniMath.CategoryTheory.Equivalences.Core. Require Import UniMath.CategoryTheory.Limits.BinProducts. Require Import UniMath.CategoryTheory.Limits.Pullbacks.