fact: Definition setofendabgr_to_isbinopfun {G : abgr} (f : setofendabgr G) : isbinopfun (pr1setofendabgr f) := pr1 (pr2 f).
imports: UniMath.MoreFoundations.Tactics UniMath.Algebra.RigsAndRings UniMath.Algebra.Groups UniMath.Algebra.Monoids