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arXiv 0712.4087math.NTmath.CO
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关于偏θ函数的差分

On the difference of partial theta functions

Alexander Berkovich

摘要:

形式为add((-1)^n q^(n(n-1)/2)x^n,n>=0)的和称为部分θ函数。在他丢失的笔记本中,拉马努金记录了这些功能的许多身份。2003年,Warnaar发现了两个部分θ函数之和的一个简洁公式。随后,Andrews和Warnaar对两个偏θ函数的乘积建立了类似的结果。本文讨论了Andrews-Warnaar恒等式与Gasper和Rahman的乘积公式(1986)之间的关系。利用Sears-Carlitz变换对3 π_2的无限延拓,给出了两个部分θ级数差的一个伴随恒等式的一个新的简洁证明.这个差分公式最早出现在Schilling-Warnaar(2002)的工作中。最后,我证明了Schilling-Warnnar(2002)和Warnaar(2003)公式实际上是等价的。

英文摘要:

Sums of the form add((-1)^n q^(n(n-1)/2) x^n, n>=0) are called partial theta functions. In his lost notebook, Ramanujan recorded many identities for those functions. In 2003, Warnaar found an elegant formula for a sum of two partial theta functions. Subsequently, Andrews and Warnaar established a similar result for the product of two partial theta functions. In this note, I discuss the relation between the Andrews-Warnaar identity and the (1986) product formula due to Gasper and Rahman. I employ nonterminating extension of Sears-Carlitz transformation for 3ϕ_2 to provide a new elegant proof for a companion identity for the difference of two partial theta series. This difference formula first appeared in the work of Schilling-Warnaar (2002). Finally, I show that Schilling-Warnnar (2002) and Warnaar (2003) formulas are, in fact, equivalent.

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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