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In this article we present ways to evaluate certain sums, products and continued fractions using tools from the theory of elliptic functions. The specific results appear to be new, although similar ones can be found in the leterature; in…

General Mathematics · Mathematics 2010-01-18 Nikos Bagis , M. L. Glasser

We extend some results recently obtained by Dan Romik about the Taylor coefficients of the theta function $\theta_{3}\left(1\right)$ to the case $\theta_{3}\left(q\right)$ of an arbitrary value of the elliptic modulus $k.$ These results are…

Number Theory · Mathematics 2020-03-18 Tanay Wakhare , Christophe Vignat

In this paper we present experimental ways of evaluating Ramanujan`s quantities which as someone can see are related with algebraic numbers. The good thing with algebraic numbers is that can be found in a closed form, from there…

General Mathematics · Mathematics 2009-12-31 Nikos Bagis

We prove that there is a correspondence between Ramanujan-type formulas for 1/\pi, and formulas for Dirichlet L-values. The same method also allows us to resolve certain values of the Epstein zeta function in terms of rapidly converging…

Number Theory · Mathematics 2019-02-20 Jesús Guillera , Mathew Rogers

We use the method of generating functions to find the limit of a $q$-continued fraction, with 4 parameters, as a ratio of certain $q$-series. We then use this result to give new proofs of several known continued fraction identities,…

Number Theory · Mathematics 2019-01-04 Douglas Bowman , James Mc Laughlin , Nancy J. Wyshinski

We exploit transformations relating generalized $q$-series, infinite products, sums over integer partitions, and continued fractions, to find partition-theoretic formulas to compute the values of constants such as $\pi$, and to connect sums…

Number Theory · Mathematics 2016-05-19 Robert Schneider

In the former part of this paper, we give functional equations for Barnes multiple zeta-functions and consider some relevant results. In particular, we show that Ramanujan's classical formula for the Riemann zeta values can be derived from…

Number Theory · Mathematics 2014-09-02 Yasushi Komori , Kohji Matsumoto , Hirofumi Tsumura

This paper is a tribute to the genius of the legendary Indian mathematician Srinivasa Ramanujan (22 December 1887 - 26 April 1920) in the centenary year of his death. The life story of Ramanujan is so well known that it needs no elaboration…

History and Overview · Mathematics 2021-03-18 V. N. Krishnachandran

In this Ph.D. thesis, written under the direction of D.B. Zagier and R.W. Bruggeman, we study the mock theta functions, that were introduced by Ramanujan. We show how they can be interpreted in the theory of (real-analytic) modular forms.…

Number Theory · Mathematics 2008-07-31 Sander Zwegers

We show a connection formula between two different $q$-Airy functions. One is called the Ramanujan function which appears in Ramanujan's "Lost notebook". Another one is called the $q$-Airy function that obtained in the study of the second…

Classical Analysis and ODEs · Mathematics 2011-07-04 Takeshi Morita

The aim in this note is to provide a generalization of an interesting entry in Ramanujan's Notebooks that relate sums involving the derivatives of a function Phi(t) evaluated at 0 and 1. The generalization obtained is derived with the help…

Complex Variables · Mathematics 2014-01-16 Y. S. Kim , A. K. Rathie , R. B. Paris

A continued fraction $v(\tau)$ of Ramanujan is evaluated at certain arguments in the field $K = \mathbb{Q}(\sqrt{-d})$, with $-d \equiv 1$ (mod $8$), in which the ideal $(2) = \wp_2 \wp_2'$ is a product of two prime ideals. These values of…

Number Theory · Mathematics 2023-02-14 Sushmanth J. Akkarapakam , Patrick Morton

For a given prime $p$, we study the properties of the $p$-dissection identities of Ramanujan's theta functions $\psi(q)$ and $f(-q)$, respectively. Then as applications, we find many infinite family of congruences modulo 2 for some…

Combinatorics · Mathematics 2013-02-18 Suping Cui , Nancy Shanshan Gu

We deduce $q$-continued fractions $S_{1}(q)$, $S_{2}(q)$ and $S_{3}(q)$ of order fourteen, and continued fractions $V_{1}(q)$, $V_{2}(q)$ and $V_{3}(q)$ of order twenty-eight from a general continued fraction identity of Ramanujan. We…

Number Theory · Mathematics 2023-05-25 Shraddha Rajkhowa , Nipen Saikia

In this paper, we show that the classical Cassini and Catalan identities for Fibonacci numbers arise naturally from a single quadratic theta-function identity of Ramanujan. Expanding the identity…

Combinatorics · Mathematics 2025-08-19 Nagananda K G , Jong Sung Kim

We investigate the question of when an eta quotient is a derivative of a formal power series with integer coefficients and present an analysis in the case of level 10. As a consequence, we establish and classify an infinite number of…

Number Theory · Mathematics 2025-03-25 Shaun Cooper , Timothy Huber , Jeffery Opoku

We evaluate some finite and infinite sums involving $q$-trigonometric and $q$-digamma functions. Upon letting $q$ approach $1$, one obtains corresponding sums for the classical trigonometric and the digamma functions. Our key argument is a…

Number Theory · Mathematics 2019-03-08 Mohamed El Bachraoui , József Sándor

We revisit several partition-theoretic generating functions, including the theta quotients from Ramanujan's lost notebook, MacMahon's partition functions, and reciprocal sums of parts in partitions, through the lens of the classical Fa\`{a}…

Number Theory · Mathematics 2025-07-02 Toshiki Matsusaka

We give an elementary proof of some identities that express the squares of Riemann zeta function at integer points in terms of the series involving hyperbolic functions, digamma function, Bernoulli numbers etc. In this version, inaccuracies…

Number Theory · Mathematics 2026-03-24 M. A. Korolev

We studied Ramanujan series $\sum_{q=1}^{\infty}G(q)c_q(a)$, where $c_q(a)$ is the well-known Ramanujan sum and the complex numbers $G(q)$, as $q\in$N, are the Ramanujan coefficients; of course, we mean, implicitly, that the series…

Number Theory · Mathematics 2023-06-27 Giovanni Coppola
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