Proposition equalizer_from_pb_prod_comm : equalizer_from_pb_prod_map · i = h. Proof. exact (PullbackArrow_PullbackPr2 e _ (h · f) h equalizer_from_pb_prod_map_eq). Qed.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Prelude. Require Import UniMath.CategoryTheory.Limits.Terminal. Require Import UniMath.CategoryTheory.Limits.BinProducts. Require Import UniMath.CategoryTheory.Limits.Equalizers. Require Import UniMath.CategoryTheory.Limits.Pullbacks. Section EqualizersFromPullbackProducts. End EqualizersFromPullbackProducts. - exact (BinProductsFromPullbacks PB T).