Definition isofnelcoprodwithunit {X : UU} {n : nat} (sx : isofnel n X) : isofnel (S n) (X ⨿ unit) := hinhfun nelstructoncoprodwithunit sx.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions. Require Import UniMath.MoreFoundations.NegativePropositions. Require Import UniMath.MoreFoundations.Subtypes.