Definition presented_abgr_intro {X : hSet} {R : hrel (free_abgr X)} : X → presented_abgr X R := presented_abgr_pr R ∘ free_abgr_unit.
Require Import UniMath.MoreFoundations.Subtypes. Require Import UniMath.MoreFoundations.Sets. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.IteratedBinaryOperations. Require Import UniMath.Combinatorics.Lists.