Definition hzneq0andmultlinv ( n m : hz ) ( isnm : hzneq ( n * m ) 0 ) : hzneq n 0 := ringneq0andmultlinv hz n m isnm .
Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups.