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This paper presents an approach to summing a few families of infinite series involving hyperbolic functions, some of which were first studied by Ramanujan. The key idea is based on their contour integral representations and residue…

Number Theory · Mathematics 2024-09-27 Ce Xu , Jianqiang Zhao

Inspired by a famous identity of Ramanujan, we propose a general formula linearizing the convolution of Dirichlet series as the sum of Dirichlet series with modified weights; its specialization produces new identities and recovers several…

Number Theory · Mathematics 2022-02-04 Parth Chavan , Sarth Chavan , Christophe Vignat , Tanay Wakhare

This paper develops an approach to the evaluation of infinite series involving hyperbolic functions. By using the approach, we give explicit formulas for several classes of series of hyperbolic functions in terms of Riemann zeta values.…

Number Theory · Mathematics 2017-07-24 Ce Xu

In this paper we obtain some new transformation formula for Ramanujan summation formula and also establish some eta-function identities. we also deduce a q-Gamma function identity, n q-integral and some interesting series representation.

Number Theory · Mathematics 2007-05-23 C. Adiga , N. Anitha , T. Kim

In the first part we establish a connection between the Euler-Maclaurin summation formula and the Rota-Baxter functional equation. In the second part we give a simple proof of a formula, due to Ramanujan, on the summation of certain…

Classical Analysis and ODEs · Mathematics 2007-11-14 Oleg Ogievetsky , Vadim Schechtman

In this article, we consider systems of linear congruences in several variables and obtain necessary and sufficient conditions as well as explicit expressions for the number of solutions subject to certain restriction conditions. These…

Number Theory · Mathematics 2024-03-05 C. G. Karthick Babu , Ranjan Bera , B. Sury

We prove four new Rogers-Ramanujan-type identities for double series. They follow from the classical Rogers-Ramanujan identities using the constant term method and properties of Rogers-Szeg\H{o} polynomials.

Number Theory · Mathematics 2024-11-20 Dandan Chen , Siyu Yin

This paper gives a short but reasonably comprehensive review of Ramanujan's {_1\psi_1} summation and its generalisations. It covers the history of Ramanujan's summation, simple applications to sums of squares and orthogonal polynomials,…

Combinatorics · Mathematics 2013-04-08 S. Ole Warnaar

In the sixth chapter of his notebooks Ramanujan introduced a method of summing divergent series which assigns to the series the value of the associated Euler-MacLaurin constant that arises by applying the Euler-MacLaurin summation formula…

Number Theory · Mathematics 2009-01-23 B. Candelpergher , H. Gopalkrishna Gadiyar , R. Padma

We derive certain identities involving various known arithmetical functions and a generalized version of Ramanujan sum. L. Toth constructed certain weighted averages of Ramanujan sums with various arithmetic functions as weights. We choose…

Number Theory · Mathematics 2018-05-08 K Vishnu Namboothiri

In this expository article, we discuss the contributions made by several mathematicians with regard to a famous formula of Ramanujan for odd zeta values. The goal is to complement the excellent survey by Berndt and Straub…

Number Theory · Mathematics 2023-12-27 Atul Dixit

During his lifetime, Ramanujan provided many formulae relating binomial sums to special values of the Gamma function. Based on numerical computations, Van Hamme recently conjectured $p$-adic analogues to such formulae. Using a combination…

Number Theory · Mathematics 2021-02-03 Dermot McCarthy , Robert Osburn

First we give general formulas for proving real or complex Ramanujan series for $1/\pi$. Then, as an example, we apply them for providing complete proofs of the fastest series for $1/\pi$ due to Ramanujan using Russell and Weber modular…

Number Theory · Mathematics 2025-07-21 Jesús Guillera

We give some results and conjectures about recurrence relations for certain sequences of binomial sums.

Combinatorics · Mathematics 2007-05-23 Johann Cigler

Ramanujan sums have attracted significant attention in both mathematical and engineering disciplines due to their diverse applications. In this paper, we introduce an algebraic generalization of Ramanujan sums, derived through polynomial…

Number Theory · Mathematics 2025-07-09 N. Uday Kiran

We generalize Ramanujan method of approximating the smallest root of an equation which is found in Ramanujan Note books, Part-I. We provide simple analytical proof to study convergence of this method. Moreover, we study iterative approach…

Numerical Analysis · Mathematics 2011-12-22 Ramesh Kumar Muthumalai

We establish necessary and sufficient conditions for a polynomial to be divisible by a cyclotomic polynomials and derive new formulas involving Ramanujan sums as an application of our results. Additionally, we provide new insights into the…

Number Theory · Mathematics 2025-08-06 Laura De Carli , Maurizio Laporta

An identity by Ramanujan related to the multisection of Bernoulli numbers is revisited. Two alternative approaches are proposed, both relying on the multisection technique. A geometric approach reveals the role played by the symmetries of…

Number Theory · Mathematics 2025-09-03 Parth Chavan , Christophe Vignat

We establish $q$-analogs for four congruences involving central binomial coefficients. The $q$-identities necessary for this purpose are shown via the $q$-WZ method.

Number Theory · Mathematics 2012-01-31 Roberto Tauraso

We revisit several entries from Ramanujan's notebooks which follow from more elementary arguments than a first glance may suggest. Our goal is to demystify these results through more accessible proofs, while also shining some light on the…

History and Overview · Mathematics 2026-05-12 Zachary P. Bradshaw , C. Vignat