Lemma stn_implies_ngt0 { n : nat} (i : ⟦ n ⟧%stn) : n > 0. Proof. eapply natgthgehtrans. { exact (stnlt i). } apply natgehn0. 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.