Definition rigtoringrel (X : rig) {R : hrel X} (is : @isbinophrel (rigaddabmonoid X) R) : hrel (rigtoring X) := abgrdiffrel (rigaddabmonoid X) is.
Require Import UniMath.Algebra.Groups. Require Import UniMath.MoreFoundations.Sets. Require Import UniMath.MoreFoundations.Orders.