Definition islinv_Dcuts_inv : ∏ x : Dcuts, ∏ Hx0 : x ≠ 0, Dcuts_mult (Dcuts_inv x Hx0) x = 1.
Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.Notations. Require Import UniMath.RealNumbers.Sets. Require Import UniMath.OrderTheory.Lattice.Lattice. Require Import UniMath.RealNumbers.Prelim. Require Import UniMath.RealNumbers.NonnegativeRationals.