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