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A new sums-of-tails identity involving two parameters $b$ and $d$ is obtained and is used to derive more results of similar type. One of Ramanujan's sums-of-tails identities from the Lost Notebook is shown to be a special case of our…

Combinatorics · Mathematics 2025-08-07 Atul Dixit , Gaurav Kumar , Aviral Srivastava

We prove a number of new Rogers-Ramanujan type identities involving double, triple and quadruple sums. They were discovered after an extensive search using Maple. The main idea of proofs is to reduce them to some known identities in the…

Combinatorics · Mathematics 2023-08-02 Zhi Li , Liuquan Wang

The mock theta conjectures are ten identities involving Ramanujan's fifth-order mock theta functions. The conjectures were proven by Hickerson in 1988 using q-series methods. Using methods from the theory of harmonic Maass forms,…

Number Theory · Mathematics 2016-04-19 Nickolas Andersen

We prove some new modular identities for the Rogers\textendash Ramanujan continued fraction. For example, if $R(q)$ denotes the Rogers\textendash Ramanujan continued fraction, then…

Number Theory · Mathematics 2024-10-23 Nayandeep Deka Baruah , Pranjal Talukdar

We prove a q-series identity that generalises Macdonald's A_{2n}^{(2)} eta-function identity and the Rogers-Ramanujan identities. We conjecture our result to generalise even further to also include the Andrews-Gordon identities.

Combinatorics · Mathematics 2012-02-28 S. Ole Warnaar , Wadim Zudilin

The work of Andrews and Merca on the truncated Euler's pentagonal number theorem led to a resurgence in research on truncated theta series identities. In particular, Yee proved a truncated version of the Jacobi Triple Product (JTP)…

Combinatorics · Mathematics 2024-01-09 Cristina Ballantine , Brooke Feigon

Previously, we proved an identity for theta functions of degree eight, and several applications of it were also discussed. This identity is a natural extension of the addition formula for the Weierstrass sigma-function. In this paper we…

Number Theory · Mathematics 2021-05-03 Zhi-Guo Liu

We use the method of tiling to give elementary combinatorial proofs of some celebrated $q$-series identities, such as Jacobi triple product identity, Rogers-Ramanujan identities, and some identities of Rogers. We give a tiling proof of the…

Combinatorics · Mathematics 2022-05-17 Alok Shukla

By employing the classical tools from the theory of $q$-series and theta functions, new fascinating identities on different continued fractions can be achieved. In this article, we use the product expansion of Jacobi's theta function to…

Number Theory · Mathematics 2026-04-01 Shruthi C. Bhat , B. R. Srivatsa Kumar

In this paper we generalize the famous Jacobi's triple product identity, considered as an identity for theta functions with characteristics and their derivatives, to higher genus/dimension. By applying the results and methods developed in…

Number Theory · Mathematics 2007-05-23 Samuel Grushevsky , Riccardo Salvati Manni

Recently, Rosengren utilized an integral method to prove a number of conjectural identities found by Kanade and Russell. Using this integral method, we give new proofs to some double sum identities of Rogers-Ramanujan type. These identities…

Combinatorics · Mathematics 2022-05-30 Liuquan Wang

We consider expansions of products of theta-functions associated with arbitrary root systems in terms of nonsymmetric Macdonald polynomials at $t=\infty$ divided by their norms. The latter are identified with the graded characters of…

Representation Theory · Mathematics 2018-02-13 Ivan Cherednik , Syu Kato

We evaluate $q$-Bessel functions at an infinite sequence of points and introduce a generalization of the Ramanujan function and give an extension of the $m$-version of the Rogers-Ramanujan identities. We also prove several generating…

Classical Analysis and ODEs · Mathematics 2015-08-28 Mourad E. H. Ismail , Ruiming Zhang

We show that the series expansions of certain $q$-products have \textit{matching coefficients} with their reciprocals. Several of the results are associated to Ramanujan's continued fractions. For example, let $R(q)$ denote the…

Number Theory · Mathematics 2023-01-26 Nayandeep Deka Baruah , Hirakjyoti Das

This manuscript introduces a general multisection identity expressed equivalently in terms of infinite double products and/or infinite double series, from which several new product or summation identities involving special functions…

Number Theory · Mathematics 2024-05-16 C. Vignat , M. Milgram

We study q-integral representations of the q-gamma and the q-beta functions. This study leads to a very interesting q-constant. As an application of these integral representations, we obtain a simple conceptual proof of a family of…

Quantum Algebra · Mathematics 2015-12-18 Alberto De Sole , Victor Kac

We find two involutions on partitions that lead to partition identities for Ramanujan's third order mock theta functions $\phi(-q)$ and $\psi(-q)$. We also give an involution for Fine's partition identity on the mock theta function f(q).…

Combinatorics · Mathematics 2010-06-17 William Y. C. Chen , Kathy Q. Ji , Eric H. Liu

We prove several infinite families of $q$-series identities for false theta functions and related series. These identities are motivated by considerations of characters of modules of vertex operator superalgebras and of quantum…

Number Theory · Mathematics 2020-09-10 Chris Jennings-Shaffer , Antun Milas

In this paper, we prove that there is a natural correspondence between product identities for theta functions and integer matrix exact covering systems. We show that since $\mathbb{Z}^n$ can be taken as the disjoint union of a lattice…

Number Theory · Mathematics 2010-05-28 Zhu Cao

Strict partitions are enumerated with respect to the weight, the number of parts, and the number of sequences of odd length. We write this trivariate generating function as a double sum $q$-series. Equipped with such a combinatorial set-up,…

Combinatorics · Mathematics 2024-10-15 Shishuo Fu , Haijun Li