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arXiv · 2510.08823

Fourier transform pairs and Eisenstein-type series related to Jacobi elliptic functions

Peng-Cheng Hang·Alexey Kuznetsov
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Abstract

We compute Fourier transforms of functions expressed as a ratio of one of the Jacobi elliptic functions divided by $\sinh(πx)$ or $\cosh(πx)$. In many cases, the resulting Fourier transform remains within the same class of functions. Applying the Mellin transform, we obtain sixteen Eisenstein-type series $ζ_{j,l}(s,τ)$, for which we establish several results: analytic continuation with respect to the variable $s$, a functional equation connecting $ζ_{j,l}(s,τ)$ and $ζ_{l,j}(1-s,-1/τ)$, and explicit expressions for $ζ_{j,l}(s,τ)$ when $s$ runs through a sequence of positive even or odd integers.

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Peng-Cheng Hang, Alexey Kuznetsov. 2026-03-02. Fourier transform pairs and Eisenstein-type series related to Jacobi elliptic functions. https://arxiv.org/abs/2510.08823

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