{x : ℕ ∈ S | x > 0} : set ℕ
{x : ℕ ∈ s | x > 0} : finset ℕ
@set.sep.{1} nat (λ (x : nat), @gt.{1} nat 11.source.to.has_lt x 0) S : set.{1} nat
@finset.sep.{1} nat (λ (x x_1 : nat), nat.has_decidable_eq x x_1) (λ (x : nat), @gt.{1} nat 11.source.to.has_lt x 0)
  (λ (x : nat), nat.decidable_lt 0 x)
  s :
  finset.{1} nat