Riemann–von Mangoldt formula

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In mathematics, the Riemann–von Mangoldt formula, named for Bernhard Riemann and Hans Carl Friedrich von Mangoldt, describes the distribution of the zeros of the Riemann zeta function.

The formula states that the number N(T) of zeros of the zeta function with imaginary part greater than 0 and less than or equal to T satisfies

N(T)={\frac {T}{2\pi }}\log {\frac {T}{2\pi }}-{\frac {T}{2\pi }}+O(\log {T}).

The formula was stated by Riemann in his notable paper "On the Number of Primes Less Than a Given Magnitude" (1859) and was finally proved by Mangoldt in 1905.

Backlund gives an explicit form of the error for all T > 2:

\left\vert {N(T)-\left({{\frac {T}{2\pi }}\log {\frac {T}{2\pi }}-{\frac {T}{2\pi }}}-{\frac {7}{8}}\right)}\right\vert <0.137\log T+0.443\log \log T+4.350\ .

Under the Lindelöf and Riemann hypotheses the error term can be improved to $o(\log {T})$ and $O(\log {T}/\log {\log {T}})$ respectively.

Similarly, for any primitive Dirichlet character χ modulo q, we have

N(T,\chi )={\frac {T}{\pi }}\log {\frac {qT}{2\pi e}}+O(\log {qT}),

where N(T,χ) denotes the number of zeros of L(s,χ) with imaginary part between -T and T.

Notes

Titchmarsh (1986), Theorems 13.6(A) and 14.13.

References

Edwards, H.M. (1974). Riemann's zeta function. Pure and Applied Mathematics. Vol. 58. New York-London: Academic Press. ISBN 0-12-232750-0. Zbl 0315.10035.
Ivić, Aleksandar (2013). The theory of Hardy's Z-function. Cambridge Tracts in Mathematics. Vol. 196. Cambridge: Cambridge University Press. ISBN 978-1-107-02883-8. Zbl 1269.11075.
Patterson, S.J. (1988). An introduction to the theory of the Riemann zeta-function. Cambridge Studies in Advanced Mathematics. Vol. 14. Cambridge: Cambridge University Press. ISBN 0-521-33535-3. Zbl 0641.10029.
Titchmarsh, Edward Charles (1986), The theory of the Riemann zeta-function (2nd ed.), The Clarendon Press Oxford University Press, ISBN 978-0-19-853369-6, MR 0882550

v t e L-functions in number theory
Analytic examples	Riemann zeta function Dirichlet L-functions L-functions of Hecke characters Automorphic L-functions Selberg class
Algebraic examples	Dedekind zeta functions Artin L-functions Hasse–Weil L-functions Motivic L-functions
Theorems	Analytic class number formula Riemann–von Mangoldt formula Weil conjectures
Analytic conjectures	Riemann hypothesis Generalized Riemann hypothesis Lindelöf hypothesis Ramanujan–Petersson conjecture Artin conjecture
Algebraic conjectures	Birch and Swinnerton-Dyer conjecture Deligne's conjecture Beilinson conjectures Bloch–Kato conjecture Langlands conjecture
p-adic L-functions	Main conjecture of Iwasawa theory Selmer group Euler system

v t e Bernhard Riemann
Cauchy–Riemann equations Generalized Riemann hypothesis Grand Riemann hypothesis Grothendieck–Hirzebruch–Riemann–Roch theorem Hirzebruch–Riemann–Roch theorem Local zeta function Measurable Riemann mapping theorem Riemann (crater) Riemann Xi function Riemann curvature tensor Riemann hypothesis Riemann integral Riemann invariant Riemann mapping theorem Riemann form Riemann problem Riemann series theorem Riemann solver Riemann sphere Riemann sum Riemann surface Riemann zeta function Riemann's differential equation Riemann's minimal surface Riemannian circle Riemannian connection on a surface Riemannian geometry Riemann–Hilbert correspondence Riemann–Hilbert problems Riemann–Lebesgue lemma Riemann–Liouville integral Riemann–Roch theorem Riemann–Roch theorem for smooth manifolds Riemann–Siegel formula Riemann–Siegel theta function Riemann–Silberstein vector Riemann–Stieltjes integral Riemann–von Mangoldt formula
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Bernhard Riemann

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