Definition make_internal_relation {C : category} (x : C) (r : C) (s t : r --> x) (p : ∏ (w : C) (f g : w --> r), f · s = g · s → f · t = g · t → f = g) : internal_relation x := r ,, s ,, t ,, p.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Prelude. Require Import UniMath.CategoryTheory.Limits.Pullbacks. Require Import UniMath.CategoryTheory.Limits.Coequalizers. Require Import UniMath.CategoryTheory.RegularAndExact.RegularCategory.