Lemma isaprop_nat_eq_or_neq {m n : nat} : isaprop ((m = n) ⨿ (m ≠ n)). Proof. refine (@isaprop_dec_with_negProp (_,,_) (natneq _ _)). apply isasetnat. 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.