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We evaluate, by elementary means, a new family of Ap\'ery-like series involving multiple $t$-harmonic star sums of even weight. Using trigonometric expansions, inverse tangent integrals, and binomial recurrences, we obtain explicit…

Number Theory · Mathematics 2026-01-29 Jorge Antonio González Layja

In this paper, we study some Euler-Ap\'ery-type series which involve central binomial coefficients and (generalized) harmonic numbers. In particular, we establish elegant explicit formulas of some series by iterated integrals and…

Number Theory · Mathematics 2019-10-22 Weiping Wang , Ce Xu

We generalize techniques of Addison to a vastly larger context. We obtain integral representations in terms of the first periodic Bernoulli polynomial for a number of important special functions including the Lerch zeta, polylogarithm,…

Mathematical Physics · Physics 2010-06-15 Mark W. Coffey

We, by making use of elementary arguments, deduce integral representations of the Legendre chi function $\chi_{s}(x)$ valid for $|z|<1$ and $\Re(s)>1$. Our earlier established results on the integral representations for the Riemann zeta…

Classical Analysis and ODEs · Mathematics 2009-11-30 Djurdje Cvijović

Mathematical justifications are given for several integral and series representations of the Dirac delta function which appear in the physics literature. These include integrals of products of Airy functions, and of Coulomb wave functions;…

Classical Analysis and ODEs · Mathematics 2013-03-11 Y. T. Li , R. Wong

We present an integral representation formula for a Dirichlet series whose coefficients are the values of the Liouville's arithmetic function.

Number Theory · Mathematics 2013-01-17 Guy Laville

Using Cauchy's Integral Theorem as a basis, what may be a new series representation for Dirichlet's function $\eta(s)$, and hence Riemann's function $\zeta(s)$, is obtained in terms of the Exponential Integral function $E_{s}(i\kappa)$ of…

Classical Analysis and ODEs · Mathematics 2023-03-15 Michael Milgram

We show new integral representations for dilogarithm and trilogarithm functions on the unit interval. As a consequence, we also prove (1) new integral representations for Apery, Catalan constants, and Legendre chi functions of order 2, 3,…

Number Theory · Mathematics 2021-09-28 Masato Kobayashi

We have established novel integral representations of the Riemann zeta-function and Dirichlet eta-function based on powers of trigonometric functions and digamma function, and then use these representations to find close forms of Laurent…

Number Theory · Mathematics 2018-10-22 Sergey K. Sekatskii

Contour integral representations for Riemann's Zeta function and Dirichelet's Eta (alternating Zeta) function are presented and investigated. These representations flow naturally from methods developed in the 1800's, but somehow they do not…

Complex Variables · Mathematics 2013-05-20 Michael S. Milgram

In this paper, we formally introduce the notion of Ap{\'e}ry-like sums and we show that every multiple zeta values can be expressed as a $\bf Z$-linear combination of them. We even describe a canonical way to do so. This allows us to put in…

Number Theory · Mathematics 2019-12-12 P. Akhilesh

For the associated Legendre and Ferrers functions of the first and second kind, we obtain new multi-derivative and multi-integral representation formulas. The multi-integral representation formulas that we derive for these functions…

Classical Analysis and ODEs · Mathematics 2020-09-22 Howard S. Cohl , Roberto S Costas-Santos

We compute the number of irreducible linear representations of self-similar branch groups, by expressing these numbers as the co\"efficients a_n of a Dirichlet series sum a_n n^{-s}. We show that this Dirichlet series has a positive…

Group Theory · Mathematics 2022-02-01 Laurent Bartholdi

This paper explores closed-form expressions for some polylogarithm integrals with integrands containing five parameters. These closed form expressions are given in terms of the Lerch transcendent function, which reduces, in some cases, to…

Classical Analysis and ODEs · Mathematics 2025-07-08 Ali Olaikhan

In this paper, we introduce and study new classes of Ap\'ery-type series involving the multiple $t$-harmonic sums by combining the methods of iterated integral and Fourier--Legendre series expansions, where the multiple $t$-harmonic sums…

Number Theory · Mathematics 2024-12-02 Ce Xu , Jianqiang Zhao

In this paper we investigate a class of integrals that were encountered in the course of a work on statistical plasma physics, in the so-called Sommerfeld temperature-expansion of the electronic entropy. We show that such integrals,…

Classical Analysis and ODEs · Mathematics 2024-12-04 Anthony Sofo , Jean-Christophe Pain , Victor Scharaschkin

We investigate Dirichlet-type series generated by representation functions that count the number of ways an integer can be expressed as a sum of 'k' signed higher even powers. By combining generalized theta generating functions with a…

Number Theory · Mathematics 2025-12-23 Mahipal Gurram

We introduce iterated beta integrals, a new class of iterated integrals on the universal abelian covering of the punctured projective line that unifies hyperlogarithms and classical beta integrals while preserving their fundamental…

Number Theory · Mathematics 2026-03-27 Minoru Hirose , Nobuo Sato

The main objective of this paper is to evaluate six new Ap\'ery-like series of weight $5$ in closed form. These series involve harmonic numbers and exhibit the characteristic reciprocal central binomial coefficient structure. Generating…

Combinatorics · Mathematics 2025-10-20 Jorge Antonio González Layja

The manuscript reviews Dirichlet Series of important multiplicative arithmetic functions. The aim is to represent these as products and ratios of Riemann zeta-functions, or, if that concise format is not found, to provide the leading…

Number Theory · Mathematics 2012-07-05 Richard J. Mathar
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