Definition nat_signature := make_signature_simple_single_sorted [ 0 ; 1 ].
Require Import UniMath.Foundations.All. Require Import UniMath.Combinatorics.StandardFiniteSets. Require Import UniMath.Combinatorics.MoreLists. Require Import UniMath.Algebra.Universal.Algebras. Require Import UniMath.Algebra.Universal.Terms.