Lemma natminus1lthn (n : nat) : n > 0 -> n - 1 < n. Proof. intros n_gt_0. apply natminuslthn. - assumption. - reflexivity. Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.Combinatorics.Maybe. Require Import UniMath.Combinatorics.StandardFiniteSets. Require Import UniMath.Algebra.Domains_and_Fields. Require Import UniMath.Algebra.RigsAndRings.