{x : ℕ | x > 0} : set ℕ
{x : ℕ | x > 0} : set ℕ
{p : ℕ × ℕ | p^.fst > p^.snd} : set (ℕ × ℕ)
{x | x > 0} : set ℕ
{x | x > 0} : set ℕ
{p | p^.fst > p^.snd} : set (ℕ × ℕ)