fact: Definition fincard_subset {X : UU} (fx : isfinite X) (P : DecidableSubtype X) : nat := fincard (subsetFiniteness fx P).
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.NegativePropositions UniMath.Combinatorics.StandardFiniteSets UniMath.MoreFoundations.Subtypes