Cubic identities for theta series in three variables
Robin Chapman
我们介绍了三个变量的类似物的θ系列的Borwein和Borwein。我们证明了各种身份涉及这些θ系列包括一个概括的三次身份的Borwein和Borwein。
We introduce three-variable analogues of the theta series of Borwein and Borwein. We prove various identities involving these theta series including a generalization of the cubic identity of Borwein and Borwein.
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Eigenvectors of the discrete Fourier transform can be expressed using Ramanujan theta functions. New theta function identities, Ramanujan theta function identities, and generating functions for the quadratic numbers are a consequence.
We prove a seesaw identity for theta functions with polynomials, and establish a formula for the corresponding theta contractions. We then use it to determine the restrictions of theta lifts to sub-Grassmannians, with some applications.
On Ramanujan's lost notebook and new tenth-order like identities for second-, sixth-, and eighth-order mock theta functions
该研究依托拉马努金遗失的笔记本，借助Hickerson和Mortenson的Appell函数性质，发现并证明了3个六阶仿theta函数的类十阶新恒等式，还补充了19个不同阶仿theta函数组合的类十阶恒等式。
Integer Matrix Exact Covering Systems and Product Identities for Theta Functions
本文证明了θ函数的乘积恒等式与整数矩阵精确覆盖系统的乘积恒等式之间存在着自然的对应关系。证明了由于$\mathbb{Z}^n$可以看作是由$\mathbb{Z}^n$中的$n$线性无关向量及其有限个平移所生成的格的不交并，因此θ函数的某些乘积可以写成θ函数的其它乘积的线性组合.首先给出了将$n$ θ函数的乘积写成其它θ函数乘积的线性组合的一般定理。许多已知的关于θ函数乘积的恒等式被证明是我们的主要定理的特殊情况。几个条目在拉马努金的笔记本以及新的身份证明的应用，包括定理产品的三个和四个θ函数，还没有得到其他方法。
This is a tutorial for using two new MAPLE packages, thetaids and ramarobinsids. The thetaids package is designed for proving generalized eta-product identities using the valence formula for modular functions. We show how this package can be used to find theta-function identities as well as prove them. As an application, we show how to find and prove Ramanujan's 40 identities for his so called Rogers-Ramanujan functions G(q) and H(q). In his thesis Robins found similar identities for higher level generalized eta-products. Our ramarobinsids package is for finding and proving identities for gene…
Quadratic Forms, Exact Covering Systems, and Product Identities for Theta Functions
本文建立整二次型与精确覆盖系统的联系，提出结构框架生成无穷多涉及拉马努金theta函数的乘积恒等式，统一解释二十二个Rogers-Ramanujan恒等式，并推导三元二次型相关新恒等式。
Some identities on the second order mock theta functions
本文通过theta函数的(p, k)参数化和Hickerson与Mortenson的恒等式，解决了Nath和Das关于二级拟theta函数的三个恒等式证明问题。
Liu established an addition formula for the Jacobian theta function by using the theory of elliptic functions. From this addition formula he obtained the Ramanujan cubic theta function identity, Winquist's identity, a theta function identities with five parameters, and many other interesting theta function identities. In this paper we will give an addition formula for the Jacobian theta function which is equivalent to Liu's addition formula. Based on this formula we deduce some known theta function identities as well as new identities. From these identities we shall establish certain new serie…
Splitting Appell functions in terms of single quotients of theta functions
围绕拉马努金仿θ函数的恒等式研究，本文提出了若干族适用于其构建基块Appell函数的类十阶恒等式，拓展了仿θ函数恒等式的研究范畴。
We prove some Lambert series which were stated by Gosper without proof or reference. As an application, we shall evaluate integrals involving Ramanujan theta function $ψ(q)$. Furthermore, motivated by Ramanujan's identities for $qψ^4(q^2)$ and $\fr{ψ^3(q)}{ψ(q^3)}$, we shall evaluate the squares of $qψ^4(q^2)$ and $\fr{ψ^3(q)}{ψ(q^3)}$ in terms of Lambert series.
On Ramanujan's cubic continued fraction and explicit evaluations of theta-functions
研究了Ramanujan三次连分数和θ函数的显式求值
Short proofs of Ramanujan-like identities for the eighth order mock theta function $V_{0}(q)$
该研究利用Appell函数性质给出八阶仿θ函数$V_0(q)$的拉马努金型恒等式的简短证明，并参照相关经典结果提出恒等式的推广形式。
Recently, Andrews, Dixit and Yee defined two partition functions $p_ω(n)$ and $p_ν(n)$ that are related with Ramanujan's mock theta functions $ω(q)$ and $ν(q)$, respectively. In this paper, we present two variable generalizations of their results. As an application, we reprove their results on $p_ω(n)$ and $p_ν(n)$ that are analogous to Euler's pentagonal number theorem.
Two $2/5$-level mock theta conjecture-like identities
本文针对 $2/5$-级弦函数，发现了两个新的 mock theta 猜想型恒等式族，每个族由四个十阶 mock theta 函数和简单 theta 函数商组成。
On identities involving the sixth order mock theta functions
我们提出了四个身份涉及六阶模拟θ函数从拉马努金的笔记本丢失的q-系列证明。我们还展示了如何拉马努金的身份可以用来给一个快速的证明四个六阶身份的Berndt和陈。
A cubic (resp. biquadratic) theta series is a power series whose n-th coefficient is equal to 1 if n is a perfect cube (resp. fourth power) and zero otherwise. We improve on a result of Bradshaw by showing that such series is not a cubic (resp. biquadratic) algebraic number when evaluated at reciprocals of integers. The proof relies on a "nested gaps technique" for linear independence and on recent results by the author on Waring's problem for cubes and biquadrates.
Partition Identities for Ramanujan's Third Order Mock Theta Functions
我们发现两个对合分区，导致分区身份Ramanujan的三阶模拟θ函数$ϕ(-q)$和$ψ(-q)$。我们还给出了Fine的分拆恒等式在模拟θ函数f（q）上的对合. Ramanujan关于三阶模拟θ函数的两个经典恒等式就是这些分拆恒等式的结果。我们的组合结构也适用于安德鲁斯的推广拉马努金的身份。
On two 10th order mock theta identities
本文给出了Gordon和McIntosh关于两个10阶模拟θ函数的代数恒等式的简短证明。
In this short note, a companion of [20], we discuss several families of $q$-series identities in connection to false and mock theta functions, characters of modules of vertex algebras, and "sum of tails".
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 dilogarithms. We also obtain closely related modular identities of the Göllnitz-Gordon-Andrews type. As a byproduct of our identities, we establish several identities for the Rogers dilogarithm function coming from multi $q$-hypergeometric series with "double poles".
Antiquantum $q$-series identities and mock theta functions
本文通过建立反量子q-级数恒等式，揭示了拉马努金第三阶假theta函数与量子模形式之间的关系。
We give simple proofs of Hecke-Rogers indefinite binary theta series identities for the two Ramanujan fifth order mock theta functions $χ_0(q)$ and $χ_1(q)$ and all three of Ramanujan's seventh order mock theta functions. We find that the coefficients of the three mock theta functions of order 7 are surprisingly related.
The bilateral series corresponding to many of the third-, fifth-, sixth- and eighth order mock theta functions may be derived as special cases of $_2ψ_2$ series \[ \sum_{n=-\infty}^{\infty}\frac{(a,c;q)_n}{(b,d;q)_n}z^n. \] Three transformation formulae for this series due to Bailey are used to derive various transformation and summation formulae for both these mock theta functions and the corresponding bilateral series. \\ New and existing summation formulae for these bilateral series are also used to make explicit in a number of cases the fact that for a mock theta function, say $χ(q)$, and …
For positive integers $m$ we consider the theta functions $f_m(z):=\sum_{mk+1\text{ square }}q^k$. Due to classical identities of Jacobi, it is known that $$f_4\equiv f_6f_{12}\pmod 2.$$ Here we prove that the only triples $(a,b,c)$ for which $f_a\equiv f_bf_c\pmod 2$ are of the form $(2q,4q,4q)$ or $(4q,4q,8q)$, where $q$ is any positive odd number, or belong to the following finite list $$\{(4,6,12),(6,8,24),(8,12,24),(10,12,60),(15,24,40),(16,24,48),(20,24,120),(21,24,168)\}.$$ The result is inspired by the Ballantine-Merca Conjecture on recurrence relations for the parity of the partition …
Capparelli conjectured two modular identities for partitions whose parts satisfy certain gap conditions, where were motivated by the calculation of characters for the standard modules of certain affine Lie algebras and by vertex operator theory. These identities were subsequently proved and refined by Andrews, who related them to Jacobi theta functions, and also by Alladi-Andrews-Gordon, Capparelli, and Tamba-Xie. In this paper we prove two new companions to Capparelli's identities, where the evaluations are expressed in terms of Jacobi theta functions and false theta functions.
On the dual nature of partial theta functions and Appell-Lerch sums
在最近的工作中，Hickerson和作者证明了将Appell-Lerch和看作部分θ函数是有用的。这个概念可以用来联系身份涉及部分θ函数的身份涉及Appell-Lerch总和。在这个意义上，Appell-Lerch和和部分θ函数似乎是对偶的对方。这种对偶理论是没有什么不同的发现安德鲁斯之间的各种身份的罗杰斯-拉马努金型相对于巴克斯特的解决方案的硬六边形模型的统计力学。作为一个应用，我们构造双边$q$系列与混合模拟模块化行为。
Universal mock theta functions and two-variable Hecke-Rogers identities
得到了三个泛模拟θ函数的二元Hecke-Rogers恒等式.这意味着许多拉马努金的模拟θ函数，包括所有的三阶函数，有一个赫克-罗杰斯型双和表示。我们发现了Dyson秩函数、过划分秩函数、M2秩函数和相关的spt-crank函数的新的母函数恒等式。利用基本超几何函数理论证明了结果。
An elementary approach to Sun Kim's general theta function identities
本文提出初等方法，在统一框架下用 q-级数证明 Kim 的一般 theta 函数恒等式，这些恒等式涵盖度数 5、11、23 的模方程及已知划分定理。
Theta Series of Unimodular Lattices, Combinatorial Identities and Weighted Symmetric Polynomials
我们找到了两个组合恒等式的根格的θ系列的有限维单李代数的$D_{4n}$型和陪集在其积分型，在著名的Essenstein系列$E_4(z)$和Ramanujan系列$\Dlt_{24}(z)$。利用这两个恒等式，我们确定了某些正定偶幺模格的无限族的θ级数，这些无穷族是由$D_{2n}$型有限维单李代数的根格的有限个拷贝胶合而成的.证明了这些θ级数是$E_4(z)$和$\Dlt_{24}(z)$两个固定多项式族的加权对称多项式。
Two identities involving the cubic partition function
本文给出了三次分拆函数的Chan恒等式的一个新证明，并给出了三次分拆函数的一个新恒等式，它类似于普通分拆函数的Zuckerman恒等式.
We propose three kinds of explicit formulas for the elliptic lambda function by the elliptic modular function. Further, we derive incredible cubic identities as a corollary of our explicit formulas and evaluate some singular values of the elliptic lambda function explicitly.
On odd-spin $A_{1}^{(1)}$-string functions, cross-spin identities, and mock theta conjecture-like identities
本文研究了奇自旋A₁^(1)-字符串函数的极有限分解，并发现新的类似假theta猜想的恒等式。
Theta function identities and q series
该研究从离散傅里叶变换特征向量出发，建立theta函数恒等式，给出经典四阶恒等式、Landen变换与q级数的初等证明，并推导Rogers-Ramanujan型恒等式和theta函数恒等式的关联。
We provide new proofs to five of Ramanujan's intriguing identities on false theta functions without using the Rogers-Fine identity and Bailey transforms.
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, specifically work of Zwegers and Bringmann-Ono, Folsom reduced the proof of the mock theta conjectures to a finite computation. Both of these approaches involve proving the identities individually, relying on work of Andrews-Garvan. Here we give a unified proof of the mock theta conjectures by realizing them as an equality between two nonholomorphic vector-valued modu…
The Bailey transform and Hecke-Rogers identities for the universal mock theta functions
最近Garvan利用基本超几何函数得到了三个泛拟θ函数$g_2(z;q),\,g_3(z;q),\,K(z;q)$的二元Hecke-Rogers恒等式，并提出了利用Bailey对技术直接证明这些恒等式的问题.本文利用Warnaar的共轭Bailey对和Slater给出的$_6ψ_6$的两种特殊情况导出的三个Bailey对，应用Bailey变换给出Garvan恒等式的证明.特别地，我们得到了与$g_3(z;q)$有关的二元Hecke-Rogers恒等式的一个紧致形式，它包含了Garvan给出的相应恒等式.我们还将这些二元Hecke-Rogers恒等式推广到无限族中。
Period Relations for Theta Products and Elliptic Integral Moments
该研究开发周期多项式方法，解释完全椭圆积分矩间已知有理关系，为模形式临界L-值的相关关系提供概念性说明。
The Kronecker theta function is a quotient of the Jacobi theta functions, which is also a special case of Ramanujan's $_1ψ_1$ summation. Using the Kronecker theta function as building blocks, we prove a decomposition theorem for theta functions. This decomposition theorem is the common source of a large number of theta function identities. Many striking theta function identities, both classical and new, are derived from this decomposition theorem with ease. A new addition formula for theta functions is established. Several known results in the theory of elliptic theta functions due to Ramanuja…
On new identities connecting Ramanujan-Göllnitz-Gordon continued fraction and Ramanujan's continued fraction of order four
本文利用q级数和theta函数理论，建立连接拉马努金-戈尔尼茨-戈登连续分数与四阶拉马努金连续分数的新恒等式，并利用拉马努金的_1ψ_1求和公式获得Lambert级数恒等式。
George Andrews and Ae Ja Yee recently established beautiful results involving bivariate generalizations of the third order mock theta functions $ω(q)$ and $ν(q)$, thereby extending their earlier results with the second author. Generalizing the Andrews-Yee identities for trivariate generalizations of these mock theta functions remained a mystery, as pointed out by Li and Yang in their recent work. We partially solve this problem and generalize these identities. Several new as well as well-known results are derived. For example, one of our two main theorems gives, as a corollary, a special case …
Identities Involving Zeros of Ramanujan and Shanks Cubic Polynomials
在本文中，我们突出拉马努金三次多项式（RCP）和一类多项式，Shanks三次多项式（SCP），生成循环三次域之间的连接。在这种方式中，我们提供了一个新的表征RCP和我们表示的任何RCP的零的显式形式，使用三角函数。此外，我们观察到，周期三的循环变换置换这些零。由于这些结果，我们提供了许多新的和美丽的身份。最后，我们将随机CP与高斯周期联系起来，得到了一个新的恒等式，并研究了与随机CP相关的一些整数序列。
Transformation of Third Order Mock Theta Functions and New $q$-Series Identities
本文利用 Lerch 和推导三阶模拟 theta 函数的变换，通过新的 $q$-级数恒等式给出 Zwegers 定理的新证明。
On Ramanujan's Continued Fractions of Orders Five, Ten, and Twenty and Associated Lambert Series Identities
本文利用Jacobi theta函数、模拟theta函数及Ramanujan求和公式，建立了阶数二十的拉马努金连分数与阶数十、Rogers-Ramanujan连分数的新恒等式，并推导了Lambert级数与theta函数的关系，扩展了先前工作。
The tenth order mock theta functions revisited
在本文中，我们考虑在拉马努金丢失的笔记本中发现的十阶模拟θ函数之间的八个恒等式中的前四个。这些最初是由Choi证明的。在这里，我们给出了一个替代（短得多）的证明。
In his lost notebook, Ramanujan listed 5 identities related to the false theta function $$f(q)=\sum_{n=0}^\infty (-1)^nq^{n(n+1)/2}.$$ A new combinatorial interpretation and proof of one of these identities is given. The methods of the proof allow for new multivariate generalizations of this identity. Additionally, the same technique can be used to obtained a combinatorial interpretation of another one of the identities.
Parameterized partial theta identities and a unified $q$-difference proof
本文通过 Andrews 变换的双参数特化，以 $q$-差分递推和边界估计统一证明了 Ramanujan 部分 theta 恒等式的五族整数参数扩展，并应用于 Lovejoy 残差恒等式，构造共轭 Bailey 对。
We shall answer a question of Mező on the $q$-analogue of the Raabe's integral formula for $0<q<1$ and we shall evaluate an integral involving the first theta function. Moreover, we will reproduce short proofs for some identities of Mező.
Cubic and quintic analogues of Ramanujan's septic theta function identity
受Ramanujan七次θ函数恒等式补全的启发，本文提出三次和五次类似，并结合Ramanujan类不变量，为其著名θ函数φ(q)提供了多种求值。
In this paper, we derive quintic versions of the cubic identities of Farkas and Kra. We believe that our results can be easily generalized to $k$ th power versions,$(k=7,9,11,\ldots).$ Moreover, we investigate the algebraic structure of theta constants of level five.
Indefinite theta functions arising from affine Lie superalgebras and sums of triangular numbers
本文通过推广 Roehrig 和 Zwegers 的不定 theta 函数理论，证明若干幂级数为模形式，并由此导出三角数生成函数幂的恒等式，进而揭示其与仿射李超代数分母恒等式的联系。
In this paper we offer some new identities associated with mock theta functions and establish new Bailey pairs related to indefinite quadratic forms. We believe our proof is instructive use of changing base of Bailey pairs, and offers new information on some Bailey pairs that have proven important in the study of Mock theta functions.
On three third order mock theta functions and Hecke-type double sums
我们得到了三个Ramanujan三阶模拟θ函数的四个Hecke型双重和.我们讨论这四个是如何相关的新的模拟θ函数安德鲁斯的工作$q$ -正交多项式和布林曼，Hikami和Lovejoy的工作统一威滕-Reshetikhin-Turaev不变量的某些塞弗特流形。然后，我们证明这些新的模拟θ函数之间的身份，首先表示他们的通用模拟θ函数。
An algebraic property of Hecke operators and two indefinite theta series
证明了定义模形式上Hecke算子的元素的一个代数性质，这意味着对应于模形式的Petersson标积的周期多项式上的配对是Hecke等变的.由于这一证明，我们得出两个不确定的θ系列身份，可以看作是类似物的Jacobi公式的θ系列与四个平方和。
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 will use this identity to reexamine our work in theta function identities in the past two decades. Hundreds of results about elliptic modular functions, both classical and new, are derived from this identity with ease. Essentially, this general theta function identity is a theta identities generating machine. Our investigation shows that many well-known results…
New polar-finite forms of generalized Euler identities for $A_{1}^{(1)}$-string functions and mock theta conjecture-like identities
本文研究了$A_{1}^{(1)}$-弦函数的极有限形式，利用准周期性方法推导出与拟theta猜想类似的恒等式，并引入了mock theta函数进行计算。
In this paper, we study the diagonal restrictions of certain Hilbert theta series for a totally real field $F$, and prove that they span the corresponding space of elliptic modular forms when the $F$ is quadratic or cubic. Furthermore, we give evidence of this phenomenon when $F$ is quartic, quintic and sextic.
Truncated Theta Series Related to the Jacobi Triple Product Identity
本文证明了Merca关于雅可比三重积截断恒等式猜想的前三种情况及相关恒等式，提出新组合解释，并用组合方法证明了可简化为已知猜想的恒等式。
A Resolvent Approach to Generalized Lambert Series and $q$-Series Identities
研究通过引入偏θ型q算子，利用其预解式表示为广义兰伯特级数等提供统一框架，从普通和双边生成函数出发得到兰伯特型展开式及相关结果，能紧凑生成q级数恒等式族。
Orbits of Jacobi forms and Theta relations
本文提出Jacobi形式轨道的新方法，用于生成Jacobi theta函数恒等式，简化已知theta关系证明并推广Riemann theta关系。
On a new modular equation of degree five and Eisenstein series identities of associated levels
本文利用拉曼纽尔的$_1ψ_1$求和公式获得level十的theta函数恒等式，推导出五次模方程，并通过巴伊的$_6ψ_6$求和公式建立level十的埃西尔斯坦级数恒等式。
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