Definition internal_issymm_mor_src {C : category} {x : C} {R : internal_relation x} (s : internal_issymm_mor R) : s · internal_relation_src R = internal_relation_tar R := pr12 s.
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.