Definition nelstructoncoprodwithunit {X : UU} {n : nat} (sx : nelstruct n X) : nelstruct (S n) (X ⨿ unit) := weqcomp (invweq (weqdnicoprod n lastelement)) (weqcoprodf1 sx).
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions. Require Import UniMath.MoreFoundations.NegativePropositions. Require Import UniMath.MoreFoundations.Subtypes.