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arXiv 2409.17818math.NTmath.CO
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涉及假不定 theta 函数的划分的精确渐近性

Precision Asymptotics for Partitions Featuring False-Indefinite Theta Functions

Kathrin Bringmann, William Craig, Caner Nazaroglu

AI总结:

本文利用模性质研究假不定 theta 函数相关划分的傅里叶系数渐近行为,通过具体例子推导出包含所有指数增长项的精确渐近展开式。

摘要:

Andrews-Dyson-Hickerson 和 Cohen 建立了 q-超几何级数、实二次域与 Maass 形式之间的显著联系。得益于 Lewis-Zagier 和 Zwegers 的工作,我们对这些联系中涉及 Maass 形式和假不定 theta 函数的部分有了完整的理解。特别是,我们可以系统地区分和研究与 Maass 形式相关的假不定 theta 函数类。这里的一个关键组成部分是 Zwegers 构建的 mock Maass theta 函数框架,这是仿照他早期关于不定 theta 函数及其在 Ramanujan 的 mock theta 函数中的应用的工作而建立的。基于这一理解,一个自然的问题是:在多大程度上可以利用模性质来研究相关傅里叶系数的渐近行为,尤其是考虑到它们与组合对象的关联。在本文中,我们开发了研究此类问题的相关方法,并表明可以在渐近展开上获得相当详细的结果,这些结果在适当条件下还能导出 Hardy-Ramanujan-Rademacher 类型的精确公式。我们通过集中研究一个涉及按奇偶性分离部分的划分的具体例子来发展这些技术,并推导出一个包含所有指数增长项的渐近展开式。

英文摘要:

Andrews-Dyson-Hickerson, Cohen build a striking relation between q-hypergeometric series, real quadratic fields, and Maass forms. Thanks to the works of Lewis-Zagier and Zwegers we have a complete understanding on the part of these relations pertaining to Maass forms and false-indefinite theta functions. In particular, we can systematically distinguish and study the class of false-indefinite theta functions related to Maass forms. A crucial component here is the framework of mock Maass theta functions built by Zwegers in analogy with his earlier work on indefinite theta functions and their application to Ramanujan's mock theta functions. Given this understanding, a natural question is to what extent one can utilize modular properties to investigate the asymptotic behavior of the associated Fourier coefficients, especially in view of their relevance to combinatorial objects. In this paper, we develop the relevant methods to study such a question and show that quite detailed results can be obtained on the asymptotic development, which also enable Hardy-Ramanujan-Rademacher type exact formulas under the right conditions. We develop these techniques by concentrating on a concrete example involving partitions with parts separated by parity and derive an asymptotic expansion that includes all the exponentially growing terms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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