File size: 209 Bytes
dae740b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | import Mathlib
namespace OAI
namespace InternalCatalan
theorem catalan_irrational :
Irrational (∑' j : ℕ, (-1 : ℝ) ^ j / ((2 * j + 1 : ℕ) : ℝ) ^ 2) := by
sorry
end InternalCatalan
end OAI
|