proposition: Lemma coequalizers_from_reflexive_left_map_eq : ι₂ · ℓ = identity y.
proof: Proof. apply BinCoproductIn2Commutes. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Epis UniMath.CategoryTheory.Limits.BinCoproducts UniMath.CategoryTheory.Retracts