fact: Definition isofnelempty2 {X : UU} (nx : neg X) : isofnel 0 X := hinhpr (nelstructonempty2 nx).
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.NegativePropositions UniMath.Combinatorics.StandardFiniteSets UniMath.MoreFoundations.Subtypes