Definition eqalg_disp : disp_cat (category_algebras σ). Proof. use disp_full_sub. exact (λ A, is_eqalgebra (hSetalgebra_to_algebra A)). Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Univalence. Require Import UniMath.CategoryTheory.DisplayedCats.Core. Require Import UniMath.CategoryTheory.DisplayedCats.Total. Require Import UniMath.CategoryTheory.DisplayedCats.Isos. Require Import UniMath.CategoryTheory.DisplayedCats.Univalence. Require Import UniMath.CategoryTheory.DisplayedCats.Constructions. Require Import UniMath.Algebra.Universal.EqAlgebras. Require Import UniMath.CategoryTheory.Categories.Universal_Algebra.Algebras.