Definition hzneq0andmultrinv ( n m : hz ) ( isnm : hzneq ( n * m ) 0 ) : hzneq m 0 := ringneq0andmultrinv hz n m isnm .
Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups.