fact: Definition isfinite_to_FiniteSet {X : UU} (f : isfinite X) : FiniteSet := X ,, f.
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.NegativePropositions UniMath.Combinatorics.StandardFiniteSets UniMath.MoreFoundations.Subtypes