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