Lemma Rabs_Rmult : ∏ x y : Reals, (Rabs (x * y)%R = Rabs x * Rabs y)%NR. Proof. exact hr_abs_mult. Qed.
Require Import UniMath.Foundations.Preamble. Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.OrderTheory.Lattice.Lattice. Require Import UniMath.RealNumbers.Prelim. Require Import UniMath.RealNumbers.Sets. Require Import UniMath.RealNumbers.NonnegativeRationals.