Definition group_mul_assoc := group_mul (group_mul x y) z == group_mul x (group_mul y z).
Require Import UniMath.MoreFoundations.Notations. Require Import UniMath.Combinatorics.StandardFiniteSets. Require Import UniMath.Combinatorics.MoreLists. Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.Universal.EqAlgebras.