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The modified zeta functions $\sum_{n \in K} n^{-s}$, where $K \subset \N$, converge absolutely for $\Re s > 1/2$. These generalise the Riemann zeta function which is known to have a meromorphic continuation to all of $\C$ with a single pole…

Classical Analysis and ODEs · Mathematics 2009-09-15 Jan-Fredrik Olsen

In this paper, we expand the theory of Weierstrassian elliptic functions by introducing auxiliary zeta functions $\zeta_\lambda$, zeta differences of first kind $\Delta_\lambda$ and second kind $\Delta_{\lambda,\mu}$ where…

Complex Variables · Mathematics 2025-12-29 Efe Gürel

We show the modular properties of the multiple 'elliptic' gamma functions, which are an extension of those of the theta function and the elliptic gamma function. The modular property of the theta function is known as Jacobi's…

Quantum Algebra · Mathematics 2007-05-23 Atsushi Narukawa

Properties of four quintic theta functions are developed in parallel with those of the classical Jacobi null theta functions. The quintic theta functions are shown to satisfy analogues of Jacobi's quartic theta function identity and…

Number Theory · Mathematics 2013-04-03 Tim Huber

In this paper we study restricted overpartitions and concave compositions. In several cases the resulting generating functions involve simultaneously modular forms, mock theta functions, mock Maass theta functions, and false theta…

Number Theory · Mathematics 2026-04-06 Koustav Banerjee , Kathrin Bringmann , Atul Dixit

Recently, Nath and Das investigated congruence properties for the second order mock theta function $B(q)$. In their paper, they asked for analytic proofs of three identities on the second order mock theta functions $A(q)$, $B(q)$ and…

Number Theory · Mathematics 2026-01-06 Xingyuan Cai , Eric H. Liu , Olivia X. M. Yao

Generalizations of classical theta functions are proposed that include any even number of analytic parameters for which conditions of quasi-periodicity are fulfilled and that are representations of extended Heisenberg group. Differential…

Mathematical Physics · Physics 2017-07-13 Yuriy Smilyanets

In this paper, we investigate new relationships for bilateral series related to two-parameter mock theta functions, which lead to many identities concerning the bilateral mock theta functions. In addition, interesting relations between the…

Number Theory · Mathematics 2025-10-20 Chun Wang

We study the character of the infinite wedge projective representation of the algebra of differential operators on the circle. We prove quasi-modularity of this character and also compute certain generating functions for traces of…

alg-geom · Mathematics 2007-05-23 Spencer Bloch , Andrei Okounkov

We obtain two-variable Hecke-Rogers identities for three universal mock theta functions. This implies that many of Ramanujan's mock theta functions, including all the third order functions, have a Hecke-Rogers-type double sum…

Number Theory · Mathematics 2014-02-11 Frank Garvan

The zeta function of a motive over a finite field is multiplicative with respect to the direct sum of motives. It has beautiful analytic properties, as were predicted by the Weil conjectures. There is also a multiplicative zeta function,…

K-Theory and Homology · Mathematics 2017-05-04 Oliver Braunling

In this paper, we develop a unified method for obtaining and proving $m$-dissections of mock theta functions. Our approach builds upon a transformation formula for Appell--Lerch sums due to Hickerson and Mortenson, which allows these sums…

Number Theory · Mathematics 2026-03-27 Frank Garvan , Hemjyoti Nath

In this short survey we give a description of the theta functions of algebraic curves, half-integer theta-nulls, and the fundamental theta functions. We describe how to determine such fundamental theta functions and describe the components…

Complex Variables · Mathematics 2019-05-30 L. Beshaj , A. Elezi , T. Shaska

Mock theta functions were introduced by Ramanujan in 1920 but a proper understanding of mock modularity has emerged only recently with the work of Zwegers in 2002. In these lectures we describe three manifestations of this apparently exotic…

High Energy Physics - Theory · Physics 2022-02-02 Atish Dabholkar , Pavel Putrov

We prove that the coefficients of certain mock theta functions possess no linear congruences modulo 3. We prove similar results for the moduli 2 and 3 for a wide class of weakly holomorphic modular forms and discuss applications. This…

Number Theory · Mathematics 2019-02-20 Scott Ahlgren , Byungchan Kim

Motivated by the works of Liu, we provide a unified approach to find Appell-Lerch series and Hecke-type series representations for mock theta functions. We establish a number of parameterized identities with two parameters $a$ and $b$.…

Number Theory · Mathematics 2019-08-26 Dandan Chen , Liuquan Wang

We present completions of mock theta functions to harmonic weak Maass forms of weight $1/2$ and algebraic formulas for the coefficients of mock theta functions. We give several harmonic weak Maass forms of weight $1/2$ that have mock theta…

Number Theory · Mathematics 2020-10-23 David Klein , Jennifer Kupka

Analytic properties of three types of multiple zeta functions, that is, the Euler-Zagier type, the Mordell-Tornheim type and the Apostol-Vu type have been studied by a lot of authors. In particular, in the study of multiple zeta functions…

Number Theory · Mathematics 2017-04-07 Takashi Miyagawa

In this paper, by the method of comparing coefficients and the inverse technique, we establish the corresponding variate forms of two identities of Andrews and Yee for mock theta functions, as well as a few allied but unusual $q$-series…

Combinatorics · Mathematics 2018-04-04 Jin Wang , Xinrong Ma

In the present manuscript, we study analytic properties of zeta functions defined by partial Euler products.

Number Theory · Mathematics 2010-11-04 Yasufumi Hashimoto