Lemma ismonoidop_ringofendabgr_op2 {G : abgr} : ismonoidop (@ringofendabgr_op2 G). Proof. exact (make_ismonoidop isassoc_ringofendabgr_op2 isunital_ringofendabgr_op2). Defined.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.Algebra.RigsAndRings. Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.Monoids.