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We obtain four Hecke-type double sums for three of Ramanujan's third order mock theta functions. We discuss how these four are related to the new mock theta functions of Andrews' work on $q$-orthogonal polynomials and Bringmann, Hikami, and…

Number Theory · Mathematics 2014-07-29 Eric Mortenson

Since their definition in 2010 by Zagier, quantum modular forms have been connected to numerous different topics such as strongly unimodal sequences, ranks, cranks, and asymptotics for mock theta functions near roots of unity. These are…

Number Theory · Mathematics 2013-07-19 Larry Rolen , Robert P. Schneider

We compare the spaces of Hermitian Jacobi forms (HJF) of weight $k$ and indices $1,2$ with classical Jacobi forms (JF) of weight $k$ and indices $1,2,4$. Using the embedding into JF, upper bounds for the order of vanishing of HJF at the…

Number Theory · Mathematics 2010-02-02 Soumya Das

The generalization of new mock theta functions of Andrews and Bringmann et al are given. Further we have given the expansion of these bilateral generalized new mock theta functions as 2 phi 1 series by Slaters transformation. After that we…

Number Theory · Mathematics 2023-08-10 Swayamprabha Tiwari , Sameena Saba

Recently, Andrews, Dixit and Yee introduced partition functions associated with Ramanujan/Watson third order mock theta functions $\omega(q)$ and $\nu(q)$. In this paper, we find several new exact generating functions for those partition…

Number Theory · Mathematics 2023-01-30 Nayandeep Deka Baruah , Nilufar Mana Begum

Harmonic weak Maass forms of half-integral weight are the subject of many recent works. They are closely related to Ramanujan's mock theta functions, their theta lifts give rise to Arakelov Green functions, and their coefficients are often…

Number Theory · Mathematics 2011-01-18 Jan H. Bruinier , Fredrik Strömberg

We prove a formula for weighted sums of the first $n$ coefficients of mock modular forms of moderate growth and apply it to Hurwitz class numbers and coefficients of negative half integral weight Eisenstein series, which take the form of…

Number Theory · Mathematics 2025-05-12 Olivia Beckwith , Nikolaos Diamantis , Rajat Gupta , Larry Rolen , Kalani Thalagoda

The main purpose of this paper is to introduce and investigate the notion of Jacobi-Jordan conformal algebra. They are a generalization of Jacobi-Jordan algebras which correspond to the case in which the formal parameter lambda equals 0. We…

Rings and Algebras · Mathematics 2024-01-05 Taoufik Chtioui , Sami Mabrouk , Abdenacer Makhlouf

By developing a connection between partial theta functions and Appell-Lerch sums, we find and prove a formula which expresses Hecke-type double sums in terms of Appell-Lerch sums and theta functions. Not only does our formula prove…

Number Theory · Mathematics 2014-08-19 Eric Mortenson , Dean Hickerson

We connect the homotopy type of simplicial moduli spaces of algebraic structures to the cohomology of their deformation complexes. Then we prove that under several assumptions, mapping spaces of algebras over a monad in an appropriate…

Algebraic Topology · Mathematics 2015-07-20 Sinan Yalin

In this paper, we compute basis elements of certain spaces of weight 0 weakly holomorphic modular forms and consider the integrality of Fourier coefficients of the modular forms. We use the results to construct automorphic correction of the…

Number Theory · Mathematics 2013-09-23 Henry H. Kim , Kyu-Hwan Lee , Yichao Zhang

We compute the rational homology of the moduli stack $\mathcal{M}$ of objects in the derived category of certain smooth complex projective varieties $X$ including toric varieties, flag varieties, curves, surfaces, and some 3- and 4-folds.…

Algebraic Geometry · Mathematics 2020-08-17 Jacob Gross

It is known from Zhu's results that under modular transformations, correlators of rational $C_2$-cofinite vertex operator algebras transform like Jacobi forms. We investigate the modular transformation properties of VOA correlators that…

Quantum Algebra · Mathematics 2025-06-18 Darlayne Addabbo , Christoph A. Keller

The primary goal of this paper is to construct the basis of the space of weight 3/2 mock modular forms which is an extension of the Borcherd-Zagier basis of weight 3/2 weakly holomorphic modular forms. The shadows of the members of this…

Number Theory · Mathematics 2016-11-11 Daeyeol Jeon , Soon-Yi Kang , Chang Heon Kim

A stream of new theta relations is obtained. They follow from the general Thomae formula, which is a new result giving expressions for theta derivatives (the zero values of the lowest non-vanishing derivatives of theta functions with…

Algebraic Geometry · Mathematics 2021-10-28 Julia Bernatska

This is the first in a sequence of papers to develop the theory of levels in quantum K-theory and study its applications. Our main results in this paper are toric mirror theorems for permutation-equivariant quantum K-theory with level…

Algebraic Geometry · Mathematics 2019-06-18 Yongbin Ruan , Ming Zhang

False theta functions are functions that are closely related to classical theta functions and mock theta functions. In this paper, we study their modular properties at all ranks by forming modular completions analogous to modular…

Number Theory · Mathematics 2022-06-29 Kathrin Bringmann , Jonas Kaszian , Antun Milas , Caner Nazaroglu

We present bases for certain spaces of meromorphic vector-valued rational-weight mock modular forms constructed using Rademacher sums.

Number Theory · Mathematics 2016-04-04 Daniel Whalen

For every point on the Jacobian of the modular curve $X_0(l)$ we define and study certain twisted holomorphic Eisenstein series. These are particular cases of a more general notion of twisted modular forms which correspond to sections on…

Number Theory · Mathematics 2007-05-23 Lev A. Borisov

Holomorphic almost modular forms are holomorphic functions of the complex upper half plane which can be approximated arbitrarily well (in a suitable sense) by modular forms of congruence subgroups of large index in $\SL(2,\ZZ)$. It is…

Number Theory · Mathematics 2010-05-21 Jens Marklof