Lemma isabgrop_ringofendabgr_op1 {G : abgr} : isabgrop (@ringofendabgr_op1 G). Proof. exact (make_isabgrop isgrop_ringofendabgr_op1 iscomm_ringofendabgr_op1). Defined.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.Algebra.RigsAndRings. Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.Monoids.