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Chebyshevskii Sbornik, 2021, Volume 22, Issue 5, Pages 198–222
DOI: https://doi.org/10.22405/2226-8383-2021-22-5-198-222
(Mi cheb1127)
 

This article is cited in 1 scientific paper (total in 1 paper)

On the mean values of the Chebyshev function and their applications

Z. Kh. Rakhmonov, O. O. Nozirov

A. Dzhuraev Institute of Mathematics (Dushanbe)
Full-text PDF (712 kB) Citations (1)
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Abstract: Assuming the validity of the extended Riemann hypothesis for the average values of Chebyshev functions over all characters modulo $q$, the following estimate holds
$$ t(x;q)=\sum_{\chi\mod q}\max_{y\leq x}|\psi(y,\chi)|\ll x+x^{1/2}q\mathscr{L}^2,\quad \mathscr{L}=\ln xq. $$
When solving a number of problems in prime number theory, it is sufficient that $t(x;q)$ admits an estimate close to this one. The best known estimates for $t(x;q)$ previously belonged to G. Montgomery, R. Vaughn, and Z. Kh. Rakhmonov. In this paper we obtain a new estimate of the form
$$ t(x;q)=\sum_{\chi\mod q}\max_{y\leq x}|\psi(y,\chi)|\ll x\mathscr{L}^{28}+x^{\frac{4}{5}}q^{\frac12}\mathscr{L}^{31}+x^\frac{1}{2}q\mathscr{L}^{32}, $$
using which for a linear exponential sum with primes we prove a stronger estimate
$$ S(\alpha,x)\ll xq^{-\frac12}\mathscr{L}^{33}+x^{\frac{4}{5}}\mathscr{L}^{32}+x^\frac{1}{2}q^\frac12\mathscr{L}^{33}, $$
when $\left|\alpha-\frac aq\right|<\frac1{q^2}$, $(a,q)=1$. We also study the distribution of Hardy-Littlewood numbers of the form $ p + n ^ 2 $ in short arithmetic progressions in the case when the difference of the progression is a power of the prime number.
Keywords: Dirichlet character, Chebishev function, exponential sums with primes, Hardy-Littlewood numbers.
Received: 06.09.2021
Accepted: 21.12.2021
Document Type: Article
UDC: 511.32
Language: Russian
Citation: Z. Kh. Rakhmonov, O. O. Nozirov, “On the mean values of the Chebyshev function and their applications”, Chebyshevskii Sb., 22:5 (2021), 198–222
Citation in format AMSBIB
\Bibitem{RakNoz21}
\by Z.~Kh.~Rakhmonov, O.~O.~Nozirov
\paper On the mean values of the Chebyshev function and their applications
\jour Chebyshevskii Sb.
\yr 2021
\vol 22
\issue 5
\pages 198--222
\mathnet{http://mi.mathnet.ru/cheb1127}
\crossref{https://doi.org/10.22405/2226-8383-2021-22-5-198-222}
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  • This publication is cited in the following 1 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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