Class Of Dirichlet Series Research Articles

Raising Series to A Power

Objective. Let be a formal power series and let . In this note, we consider the function . We find that if has a series expansion at , then its coefficients are polynomials in . The coefficients of these polynomials were found to be a weighted composition sum. Methods. The method to arrive at this representation involves logarithmic derivative and exponential representation. Findings. As a consequence of this, new identities involving partition functions and binomial coefficients were obtained. Further, a particular class of Dirichlet series is found to have the form of an exponential function. Consequently, identities involving Riemann zeta function values were obtained. Novelty. The present work generalizes a class of functions considered by D’Arcais. Divisor-sum identities involving partition functions and exponential representation of Dirichlet series of this article were new to the literature. Keywords: Polynomials, Partitions, Dirichlet Series, Divisor­Sum, Power Series

Solutions of Inhomogeneous Multiplicatively Advanced ODEs and PDEs with a q‐Fredholm Theory and Applications to a q‐Advanced Schrödinger Equation

For q > 1, a new Green’s function provides solutions of inhomogeneous multiplicatively advanced ordinary differential equations (iMADEs) of form y(N)(t) − Ay(qt) = f(t) for t ∈ [0, ∞). Such solutions are extended to global solutions on ℝ. Applications to inhomogeneous separable multiplicatively advanced partial differential equations are presented. Solutions to a linear free forced q‐advanced Schrödinger equation are obtained, opening an avenue to applications in quantum mechanics. New q‐Mittag‐Leffler functions qEα,β and ΥN,p govern the allowable decay rate of the inhomogeneities f(t) in the above iMADE. This provides a refinement to standard distribution theory, as we show is necessary for this study of iMADEs. A q‐Fredholm theory is developed and related to the above approach. For f(t) whose antiderivatives provide eigenfuntions of the noncompact integral operator K below, we exhibit solutions of the iMADE. Examples are provided, including a certain class of Dirichlet series.

Integrals of certain Dirichlet series

We compute in closed form the integrals of certain expressions involving a class of Dirichlet series. This is a generalization of a formula of Jonathan Borwein to a problem stated (and solved) by A. Ivić.

Аналог теоремы даффина-шеффера для одного класса рядов дирихле с конечнозначными коэффициэнтами

Известная теорема, доказанная Доффиным и Шеффером, утверждает, что ограниченность степенного ряда с конечнозначными коэффициентами в некотором секторе единичного круга равносильна периодичности его коэффициентов, начиная с некоторого номера. В работе указывается класс рядов Дирихле с конечнозначными коэффициентами, ограниченными в любой полосе правой полуплоскости комплексной плоскости константой, зависящей только от высоты полосы, для которых доказан аналог теоремы ДаффинаШеффера. Ранее аналог теоремы Даффина-Шеффера был получен авторами для рядов Дирихле с мультипликативными коэффициентами. Методика доказательства этого результата позволила, в частности, решить известную проблему обобщенных характеров, поставленную в 1950 году Ю.В. Линником и Н.Г. Чудаковым. В данной работе эта методика использована при доказательстве аналога ДаффинаШеффера для указанного класса рядов Дирихле с мультипликативными коэффициентами.

О моноидах натуральных чисел с однозначным разложением на простые элементы

The paper continues research on a new class of Dirichlet series — zeta functions of monoids of natural numbers. The inverse Dirichlet series for zeta functions of monoids of natural numbers with unique factorization into prime elements and for zeta-functions of sets of prime elements of monoids with unique factorization into prime elements are studied. For any β > 1 examples of Dirichlet series with an abscissa of absolute convergence σ = are constructed. For any natural β > 1 examples of a pair of zeta functions ζ(B|α) and ζ(A B, β |α ) with the equality σ AB,β = σB/ β are constructed. Various examples of monoids and corresponding zeta functions of monoids are considered. A number of properties of the zeta functions of monoids of natural numbers with unique factorization into prime factors are obtained. An explicit form of the inverse series to the zeta-function of the set of primes supplemented by one is found. An explicit form of the ratio of the Riemann zeta-function to the zeta-function of the set of primes supplemented by one is found. Nested sequences of monoids generated by primes are considered. For the zeta-functions of these monoids the nesting principle is formulated, which allows to transfer the results about the coefficients of one zeta-functions to the coefficients of other zeta-functions. In this paper the general form of all monoids of natural numbers with unique factorization into prime factors was described for the first time. In conclusion, topical problems for zeta-functions of monoids of natural numbers that require further study are considered.

Граничное поведение и задача аналитического продолжения одного класса рядов Дирихле с мультипликативными коэффициентами как целых функций на комплексную плоскость

Рассматривается класс рядов Дирихле с мультипликативными коэффициентами, определяющих функции, регулярные в правой полуплоскости комплексной плоскости и допускающие аппроксимацию полиномами Дирихле в критической полосе. Показано, что условие регулярности на мнимой оси позволяет аналитически продолжить такие ряды как целые функции на комплексную плоскость.В основе доказательсва этого факта лежат свойства аппроцксимационных полиномов Дирихле и идеи Римана-Шварца, заложенные в принципе симметрии аналитического продолжения функций комплексного переменного. Указан класс рядов Дирихле, для которых выполняется условие аналитичности на мнимой оси.Нужно отметить, что полученный в работе результат имеет непосредственное отношение к решению известной проблемы обобщенных характеров, поставленной Ю. В. Линником и Н. Г. Чудаковым в 1950м году.Указанный в работе подход в задаче аналитического продолжения рядов Дирихле с числовыми характерами допускает обобщение на ряды Дирихле с характерами числовых полей. Это позвволяет получить аналитическое продолжение не используя функциональное уравнение L-функций Дирихле числовых полей на комплексную плоскость.Отметим также, что изучаемому в работе классу рядов Дирихле принадлежат и ряды Дирихле, коэффициенты которых определяются неглавными обобщенными характерами. Можно показать, что для этих рядов выполняется условие аналитического продолжения. Еще в 1984 году В. Н. Кузнецов показал, что в случае аналитического продолжения таких рядов целым образом на комплексную плоскость с определенным порядком роста модуля, то будет иметь место гипотеза Н. Г. Чудакова о том, что обобщенный характер является характером Дирихле. Но окончательное решение проблемы обобщенных характеров, поставленной в 1950м году Ю. В. Линником и Н. Г. Чудаковым, будет приведено в следующих работах авторов.

Гипотеза о «заградительном ряде» для дзета-функций моноидов с экспоненциальной последовательностью простых

В работе продолжено изучение нового класса рядов Дирихле — дзета-функции мо­ноидов натуральных чисел. Прежде всего детально изучена дзета-функция ????(M(g)|a) геометрической прогресс М(q) с первым членом равным 1 и произвольным натураль­ным знаменателем q > 1, которая является простейшем моноидом натуральных чисел с однозначным разложением на простые элементы моноида. Для мероморфной функции ????(M(g)|a) = qa/qα -1, имеющей множество полюсовS(M(q)) ={2πikl/lnq│k ∈Z}получены представления:ζ(M(q)|α) = ∞ ∏︁ n=1(1 + α2 ln2 q 4π2n2 )︂−1 = 1 2 + 1 αlnq + ∞ ∑︁ n=1 2αlnq α2 ln2 q + 4n2π2 = = q α 2 αlnq 4π2 Γ(︂αilnq 2π )︂Γ(︂−αilnq 2π )︂.Для дзета-функции ζ(M(p~)|α) моноида M(p~) с конечным числом простых чиселp~ = (p1,...,pn) получено разложение в бесконечное произведениеζ(M(p~)|α) =P(p~)α 2 αnQ(p~)n ∏︁ ν=1∞ ∏︁ m=1(︂1 + α2 ln2 pν 4π2m2 )︂−1 ,где P(p~) = p1 ...pn, Q(p~) = lnp1 ...lnpn, и найдено функциональное уравнение ζ(M(p~)|−α) = (−1)n ζ(M(p~)|α) P(p~)α .Для моноида натуральных чисел M*(p~) = N · M−1(p~) с однозначным разложением на простые множители, состоящим из натуральных чисел n взаимно простых с P(p~) = p1 ...pn, и для эйлерово произведение P(M*(p~)|α), состоящего из сомножителей по всем простым числам отличным от p1,...,pn, найдено функциональное уравнение ζ(M*(p~)|α) = M(p~,α)ζ(M*(p~)|1−α), где M(p~,α) = M(α)· M1(p~,α) M1(p~,1−α) , M1(p~,α) = n ∏︁ ν=1(︂1− 1 pα ν)︂.Доказано, что для любого бесконечного множества простых P1 не существует аналитической функции равной lim n→∞ ζ(M(p~n)|α) на всей комплексной плоскости.Сформулирована гипотеза о заградительном ряде для любого экспоненциального множества PE простых чисел.В заключении рассмотрены актуальные задачи с дзета-функциями моноидов натуральных чисел, требующие дальнейшего исследования.

ДЗЕТА-ФУНКЦИЯ МОНОИДОВ НАТУРАЛЬНЫХ ЧИСЕЛ С ОДНОЗНАЧНЫМ РАЗЛОЖЕНИЕМ НА ПРОСТЫЕ МНОЖИТЕЛИ1

In this paper we consider a new class of Dirichlet series, the zeta functions of monoids of natural numbers. The inverse Dirichlet series for the zeta function of monoids of natural numbers are studied. It is shown that the existence of an Euler product for the zeta function of a monoid is related to the uniqueness of the factorization into prime factors in this monoid. The notion of coprime sets of natural numbers is introduced and it is shown that for such sets the multiplicativity of minimal monoids and corresponding zeta-functions of monoids takes place. It is shown that if all prime elements of a monoid are prime numbers, then the characteristic function of the monoid is a multiplicative function and in this case the zeta function of the monoid is a generalized L-function. Various examples of monoids and corresponding zeta functions of monoids are considered. The relation between the inversion of the zeta function of a monoid and the generalized Mo¨bius function on a monoid as a partially ordered set is studied by means of the divisibility of natural numbers. A number of properties of the zeta functions of monoids of natural numbers with a unique decomposition into prime factors are obtained. The paper deals with taking the logarithm of an Eulerian product as a function of a complex argument. It is shown that a continuous function that determines the value of the logarithm of an Euler product runs through all branches of the infinite-valued function of the logarithm near its pole. The corollaries on the value of a complex-valued function of a special form near a singular point are obtained. These properties imply statements about the values of the Riemann zeta function near the boundary of the region of absolute convergence. Using Bertrand’s postulate, infinite exponential sequences of prime numbers are introduced. It is shown that corresponding zeta-functions of monoids of natural numbers converge absolutely in the whole half-plane with a positive real part. Since such zeta-functions of monoids of natural numbers can be decomposed into an Euler product in the whole region of absolute convergence, they do not have zeros in the entire half-plane with a positive real part. In conclusion, topical problems with zeta-functions of monoids of natural numbers that require further investigation are considered.

On the growth of a class of Dirichlet series absolutely convergent in half-plane

In terms of generalized orders it is investigated a relation between the growth of a Dirichlet series $F(s)=\sum\limits_{n=1}^{\infty}a_n\exp\{s\lambda_n\}$ with the abscissa of asolute convergence $A\in (-\infty,+\infty)$ and the growth of Dirichlet series $F_j(s)=\sum\limits_{n=1}^{\infty}a_{n,j}\exp\{s\lambda_n\}$, $1\le j\le 2$, with the same abscissa of absolute convergence, if the coefficients $a_n$ are connected with the coefficients $a_{n,j}$ by correlation $$ \beta\left(\frac{\lambda_n}{\ln\,\left(|a_n|e^{A\lambda_n}\right)}\right)=(1+o(1)) \prod\limits_{j=1}^{m}\beta\left(\frac{\lambda_n} {\ln\,\left(|a_{n,j}|e^{A\lambda_n}\right)}\right)^{\omega_j},\ n\to\infty, $$ where $\omega_j>0$ $(1\le j\le m)$, $\sum\limits_{j=1}^{m}\omega_j=1$, and $\alpha$ is a positive slowly increasing function on $[x_0, +\infty)$.

АППРОКСИМАЦИОННЫЙ ПОДХОД В НЕКОТОРЫХ ЗАДАЧАХ ТЕОРИИ РЯДОВ ДИРИХЛЕ С МУЛЬТИПЛИКАТИВНЫМИ КОЭФФИЦИЕНТАМИ

In this paper we consider a class of Dirichlet series with multiplicative coefficients which define functions holomorphic in the right half of the complex plane, and for which there are sequences of Dirichlet polynomials that converge uniformly to these functions in any rectangle within the critical strip. We call such polynomials approximating Dirichlet polynomials. We study the properties of the approximating polynomials, in particular, for those Dirichlet series, whose coefficients are determined by nonprincipal generalized characters, i.e. finite-valued numerical characters which do not vanish on almost all prime numbers and whose summatory function is bounded. These developments are interesting in connection with the problem of the analytical continuation of such Dirichlet series to the entire complex plane, which in turn is tied with the solution of a well-known Chudakov hypothesis about every generalized character being a Dirichlet character.

О ГИПЕРБОЛИЧЕСКОЙ ДЗЕТА-ФУНКЦИИ ГУРВИЦА

The paper deals with a new object of study --- hyperbolic Hurwitz zeta function, which is given in the right \(\alpha\)-semiplane \( \alpha = \sigma + it \), \( \sigma> 1 \) by the equality $$ \zeta_H(\alpha; d, b) = \sum_{m \in \mathbb Z} \left(\, \overline{dm + b} \, \right)^{-\alpha}, $$ where \( d \neq0 \) and \( b \) --- any real number. Hyperbolic Hurwitz zeta function \( \zeta_H (\alpha; d, b) \), when \( \left\| \frac {b} {d} \right\|> 0 \) coincides with the hyperbolic zeta function of shifted one-dimensional lattice \( \zeta_H (\Lambda (d, b) | \alpha) \). The importance of this class of one-dimensional lattices is due to the fact that each Cartesian lattice is represented as a union of a finite number of Cartesian products of one-dimensional shifted lattices of the form \( \Lambda (d, b) = d \mathbb{Z} + b \). Cartesian products of one-dimensional shifted lattices are in substance shifted diagonal lattices, for which in this paper the simplest form of a functional equation for the hyperbolic zeta function of such lattices is given. The connection of the hyperbolic Hurwitz zeta function with the Hurwitz zeta function \( \zeta^* (\alpha; b)\) periodized by parameter \(b\) and with the ordinary Hurwitz zeta function \( \zeta (\alpha; b) \) is studied. New integral representations for these zeta functions and an analytic continuation to the left of the line \( \alpha = 1 + it \) are obtained. All considered hyperbolic zeta functions of lattices form an important class of Dirichlet series directly related to the development of the number-theoretical method in approximate analysis. For the study of such series the use of Abel's theorem is efficient, which gives an integral representation through improper integrals. Integration by parts of these improper integrals leads to improper integrals with Bernoulli polynomials, which are also studied in this paper.

SOLVING LINEAR EQUATIONS IN L-FUNCTIONS

We describe the solutions of the linear equation aX + bY = cZ in the class of Dirichlet series with functional equation. Proofs are based on the properties of certain nonlinear twists of the L-functions.

Estimation on curves of Dirichlet series with a convex growth majorant

For a class of Dirichlet series defined by a certain convex growth majorant we establish conditions for a sequence of indices which provide the implementation of precise estimates for their increase and decrease on curves that tend to infinity in a special way.

Mean value theorems for a class of Dirichlet series

For the mean square value of the error term associated with the Dedekind zeta function of a cubic field K 3, an asymptotic formula (instead of the upper bounds of Chandrasekharan and Narasimhan (1964) and Lau (1999) ) is obtained. Modular analogs of the classical divisor problems are also studied. Bibliography: 21 titles.

On Non-Vanishing of Convolution of Dirichlet Series

AbstractWe study the non-vanishing on the line Re(s) = 1 of the convolution series associated to two Dirichlet series in a certain class of Dirichlet series. The non-vanishing of various L-functions on the line Re(s) = 1 will be simple corollaries of our general theorems.

On the asymptotic behavior of the Laurent coefficients of a class of Dirichlet series

Matsuoka showed an asymptotic formula for the coefficients of the Laurent expansion of ζ (s) at s = 1. In the present paper we extend this result to a large class of Dirichlet series which was first studied by Chandrasekharan and Narasimhan. Our proofs are based on a saddle point argument and use the fact that the Dirichlet series under consideration admit a functional equation.

On the Laurent coefficients of a class of Dirichlet series

The generalized Euler constants for an arithmetic progression have been considered by several authors including D. H. Lehmer, W. E. Briggs, K. Dilcher and S. Kanemitsu as an important generalization of the ordinary Euler-Stieltjes constants. In this paper, answering a problem posed by Kanemitsu, we shall adopt the partial zeta-function, a special case of the Hurwitz zeta-function, as a genuine generating function for the generalized Euler constants and make extensive use of the Hurwitz zeta-function to derive all the preceding results of Dilcher and Kanemitsu in a unified and elucidated manner.

Summatory Functions of Digital Sums Occurring in Cryptography

Morain and Olivos gave two algorithms that allow fast exponentiation in elliptic curve cryptosystems. These algorithms are based on representations of integers in certain redundant binary number systems. In this paper we consider the weight and the sum of digits function of these representations. In particular, we give formulas for their summatory functions. In the proofs we use the Mellin-Perron formula. In order to apply this formula, we have to compute the analytic continuation of a class of Dirichlet series.

On the Non-Vanishing of a Certain Class of Dirichlet Series

AbstractIn this paper, we consider Dirichlet series with Euler products of the form F(s) = Πp in > 1, and which are regular in ≥ 1 except for a pole of order m at s = 1. We establish criteria for such a Dirichlet series to be nonvanishing on the line of convergence. We also show that our results can be applied to yield non-vanishing results for a subclass of the Selberg class and the Sato-Tate conjecture.

On analytic continuation and functional equation of certain Dirichlet series

Analytic continuation and functional equation of Riemann's type are proved for a class of Dirichlet series associated to rational functions.