Definition tocommringfracandminus0 (X : commring) (S : @subabmonoid (ringmultabmonoid X)) (x : X) : tocommringfrac X S (- x) = - tocommringfrac X S x := grinvandmonoidfun _ _ (isaddmonoidfuntocommringfrac X S) x.
Require Import UniMath.Algebra.Groups. Require Import UniMath.MoreFoundations.Sets. Require Import UniMath.MoreFoundations.Orders.