fact: Definition isofnelweqb {X Y : UU} {n : nat} (w : X ≃ Y) (sy : isofnel n Y) : isofnel n X := hinhfun (nelstructweqb w) sy.
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.NegativePropositions UniMath.Combinatorics.StandardFiniteSets UniMath.MoreFoundations.Subtypes