fact: Definition presented_abmonoid_intro {X : hSet} {R : hrel (free_abmonoid X)} : X → presented_abmonoid X R := presented_abmonoid_pr R ∘ free_abmonoid_unit.
imports: UniMath.MoreFoundations.Subtypes UniMath.MoreFoundations.Sets UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Algebra.IteratedBinaryOperations UniMath.Combinatorics.Lists