fact: Definition invstruct_setofendabgr_inv {G : abgr} : invstruct (@ringofendabgr_op1 G) ismonoidop_ringofendabgr_op1.
imports: UniMath.MoreFoundations.Tactics UniMath.Algebra.RigsAndRings UniMath.Algebra.Groups UniMath.Algebra.Monoids