Lemma stn_eq_or_neq_refl {n} {i : ⟦ n ⟧%stn} : stn_eq_or_neq i i = inl (idpath i). Proof. apply isaprop_stn_eq_or_neq. 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.