Definition isofnel (n : nat) (X : UU) : hProp := ∥ ⟦ n ⟧ ≃ X ∥.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions. Require Import UniMath.MoreFoundations.NegativePropositions. Require Import UniMath.MoreFoundations.Subtypes.