A set that has only finite elements
(<=> (Finite-Set ?F-Set)
(And (Set ?F-Set)
(Exists (@Elements) (= ?F-Set (Setof @Elements)))))
(Exists (@Elements) (= ?F-Set (Setof @Elements))) (Set ?F-Set)
(<=> (Finite-Set ?F-Set)
(And (Set ?F-Set)
(Exists (@Elements) (= ?F-Set (Setof @Elements)))))