fact: Definition hzlthorgeh ( n m : hz ) : ( hzlth n m ) ⨿ ( hzgeh n m ) := hzgthorleh _ _ .
imports: UniMath.Foundations.NaturalNumbers UniMath.MoreFoundations.PartA UniMath.MoreFoundations.NegativePropositions UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Algebra.RigsAndRings UniMath.NumberSystems.NaturalNumbersAlgebra