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