fact: Definition free_abgrfun {X Y : hSet} (f : X → Y) : monoidfun (free_abgr X) (free_abgr Y) := free_abgr_extend (free_abgr_unit ∘ f).
imports: UniMath.MoreFoundations.Subtypes UniMath.MoreFoundations.Sets UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Algebra.IteratedBinaryOperations UniMath.Combinatorics.Lists