チェビシェフ関数
An abbreviated version appeared as "The kth prime is greater than k(ln k + ln ln k − 1) for k ≥ 2", Mathematics of Computation, Vol. 68, No. 225 (1999), pp. 411–415.
^ Lowell Schoenfeld, "Sharper bounds for the Chebyshev functions θ(x)$ and ψ(x) II, Mathematics of Computation, Vol. 30 , No. 134 (1976), pp. 337–360.
^ Lowell Schoenfeld, "Sharper bounds for the Chebyshev functions θ(x)$ and ψ(x) II, Mathematics of Computation, Vol. 30 , No. 134 (1976), pp. 337–360.