Definition hz_abgr_fun_monoidfun {X : abgr} (x : X) : monoidfun hzaddabgr X. Proof. use monoidfunconstr. - exact (hz_abgr_fun x). - exact (hz_abgr_fun_ismonoidfun x). Defined.
Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups.