Definition hz_abmonoid_monoidfun : monoidfun (abmonoiddirprod (rigaddabmonoid natcommrig) (rigaddabmonoid natcommrig)) hzaddabgr. Proof. use monoidfunconstr. - use setquotpr. - exact hz_abmonoid_ismonoidfun. Defined.
Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups.