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arXiv · 2404.00295

A system of hypergeometric differential equations in $m$ variables of rank $p^m$

Jyoichi Kaneko·Keiji Matsumoto·Katsuyoshi Ohara·Tomohide Terasoma
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Abstract

We define a hypergeometric series in $m$ variables with $p+(p-1)m$ parameters, which reduces to the generalized hypergeometric series $_pF_{p-1}$ when $m=1$, and to Lauricella's hypergeometric series $F_C$ in $m$ variables when $p=2$. We give a system of hypergeometric differential equations annihilating the series. Under some non-integral conditions on parameters, we give an Euler type integral representation of the series, and linearly independent $p^m$ solutions to this system around a point near to the origin. We show that this system is of rank $p^m$, and determine its singular locus.

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Jyoichi Kaneko, Keiji Matsumoto, Katsuyoshi Ohara, Tomohide Terasoma. 2024-03-30. A system of hypergeometric differential equations in $m$ variables of rank $p^m$. https://arxiv.org/abs/2404.00295

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