fact: Definition nattohzandleh ( n m : nat ) ( is : natleh n m ) : hzleh ( nattohz n ) ( nattohz m ) .
imports: UniMath.Foundations.NaturalNumbers UniMath.MoreFoundations.PartA UniMath.MoreFoundations.NegativePropositions UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Algebra.RigsAndRings UniMath.NumberSystems.NaturalNumbersAlgebra