Definition isofnelcoprod {X Y : UU} {n m : nat} (sx : isofnel n X) (sy : isofnel m Y) : isofnel (n + m) (X ⨿ Y) := hinhfun2 nelstructoncoprod sx sy.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions. Require Import UniMath.MoreFoundations.NegativePropositions. Require Import UniMath.MoreFoundations.Subtypes.