fact: Definition rigtoringdistr (X : rig) : isdistr (rigtoringop1 X) (rigtoringop2 X) := make_dirprod (rigtoringldistr X) (rigtoringrdistr X).
imports: UniMath.Algebra.Groups UniMath.MoreFoundations.Sets UniMath.MoreFoundations.Orders UniMath.Algebra.Monoids