fact: Definition subsetFiniteness {X : UU} (is : isfinite X) (P : DecidableSubtype X) : isfinite (decidableSubtypeCarrier P).
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.NegativePropositions UniMath.Combinatorics.StandardFiniteSets UniMath.MoreFoundations.Subtypes