fact: Definition hzgehtogehs ( n m : hz ) : hzgeh n m -> hzgeh ( n + 1 ) m := hzlehtolehs _ _ .
imports: UniMath.Foundations.NaturalNumbers UniMath.MoreFoundations.PartA UniMath.MoreFoundations.NegativePropositions UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Algebra.RigsAndRings UniMath.NumberSystems.NaturalNumbersAlgebra