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ON APPROXIMATION OF ANALYTIC FUNCTIONS BY PERIODIC HURWITZ ZETA-FUNCTIONS

open access: yesMathematical Modelling and Analysis, 2018
The periodic Hurwitz zeta-function ζ(s, α; a), s = σ +it, with parameter 0 < α ≤ 1 and periodic sequence of complex numbers a = {am } is defined, for σ > 1, by series sum from m=0 to ∞ am / (m+α)s, and can be continued moromorphically to the whole complex plane.
Franckevič, Violeta   +2 more
openaire   +7 more sources

C-polynomials and LC-functions: towards a generalization of the Hurwitz zeta function [PDF]

open access: yesThe Ramanujan journal, 2022
Let $f(t)=\sum_{n=0}^{+\infty}\frac{C_{f,n}}{n!}t^n$ be an analytic function at $0$, and let $C_{f, n}(x)=\sum_{k=0}^{n}\binom{n}{k}C_{f,k} x^{n-k}$ be the sequence of Appell polynomials, referred to as $\textit{C-polynomials associated to f ...
Lahcen Lamgouni
semanticscholar   +1 more source

Extended Prudnikov sum

open access: yesAIMS Mathematics, 2022
A Prudnikov sum is extended to derive the finite sum of the Hurwitz-Lerch Zeta function in terms of the Hurwitz-Lerch Zeta function. This formula is then used to evaluate a number trigonometric sums and products in terms of other trigonometric functions.
Robert Reynolds, Allan Stauffer
doaj   +1 more source

On the Mishou Theorem for Zeta-Functions with Periodic Coefficients

open access: yesMathematics, 2023
Let a={am} and b={bm} be two periodic sequences of complex numbers, and, additionally, a is multiplicative. In this paper, the joint approximation of a pair of analytic functions by shifts (ζnT(s+iτ;a),ζnT(s+iτ,α;b)) of absolutely convergent Dirichlet ...
Aidas Balčiūnas   +3 more
doaj   +1 more source

On a Dirichlet Series Connected to a periodic Hurwitz zeta-function with Transcendental and rational parameter

open access: yesMathematical Modelling and Analysis, 2023
In the paper, we construct an absolutely convergent Dirichlet series which in the mean is close to the periodic Hurwitz zeta-function, and has the universality property on the approximation of a wide class of analytic functions.
A. Balčiūnas   +2 more
semanticscholar   +1 more source

Moments of the Hurwitz zeta function on the critical line

open access: yesMathematical Proceedings of the Cambridge Philosophical Society, 2022
We study the moments $M_k(T;\,\alpha) = \int_T^{2T} |\zeta(s,\alpha)|^{2k}\,dt$ of the Hurwitz zeta function $\zeta(s,\alpha)$ on the critical line, $s = 1/2 + it$ with a rational shift $\alpha \in \mathbb{Q}$ . We conjecture, in analogy with the
A. Sahay
semanticscholar   +1 more source

Infinite Sum of the Incomplete Gamma Function Expressed in Terms of the Hurwitz Zeta Function

open access: yesMathematics, 2021
We apply our simultaneous contour integral method to an infinite sum in Prudnikov et al. and use it to derive the infinite sum of the Incomplete gamma function in terms of the Hurwitz zeta function.
Robert Reynolds, Allan Stauffer
semanticscholar   +1 more source

Sum of the Hurwitz-Lerch Zeta Function over Natural Numbers: Derivation and Evaluation

open access: yesJournal of Mathematics, 2022
We consider a Hurwitz-Lerch zeta function Φs,z,a sum over the natural numbers. We provide an analytically continued closed form solution for this sum in terms of the addition of Hurwitz-Lerch zeta functions.
Robert Reynolds, Allan Stauffer
doaj   +1 more source

On the Hurwitz zeta function with an application to the beta-exponential distribution

open access: yesJournal of Inequalities and Applications, 2020
We prove a monotonicity property of the Hurwitz zeta function which, in turn, translates into a chain of inequalities for polygamma functions of different orders.
Julyan Arbel   +2 more
doaj   +1 more source

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