English

Generalized hypergeometric $G$-functions take linear independent values

Number Theory 2022-03-02 v1

Abstract

In this article, we show a new general linear independence criterion related to values of GG-functions, including the linear independence of values at algebraic points of contiguous hypergeometric functions, which is not known before. Let KK be any algebraic number field and vv be a place of KK. Let rZr\in\mathbb{Z} with r2r\ge2. Consider a1,,ar,b1,,br1Q{0}a_1,\ldots,a_{r}, b_1,\ldots,b_{r-1}\in \mathbb{Q}\setminus\{0\} not being negative integers. Assume neither aka_k nor ak+1bja_k+1-b_j be strictly positive integers (1kr,1jr1)(1\le k \le r, 1\le j \le r-1). Let α1,,αmK{0}\alpha_1,\ldots,\alpha_m\in K\setminus\{0\} with α1,,αm\alpha_1,\ldots,\alpha_m pairwise distinct. By choosing sufficiently large βZ\beta\in \mathbb{Z} depending on KK and vv such that the points α1/β,,αm/β\alpha_1/\beta,\ldots,\alpha_m/\beta are closed enough to the origin, we prove that the rm+1rm+1 numbers~:: \begin{align*} &{}_{r}F_{r-1} \biggl(\begin{matrix} a_1,\ldots, a_r\\ b_1, \ldots, b_{r-1} \end{matrix} \biggm| \dfrac{\alpha_i}{\beta}\biggr)\enspace, \ \ {}_{r}F_{r-1} \biggl(\begin{matrix} a_1+1,\ldots,\ldots,\ldots,a_r+1\\ b_1+1, \ldots, b_{r-s}+1,b_{r-s+1},\ldots,b_{r-1} \end{matrix} \biggm| \dfrac{\alpha_i}{\beta}\biggr)\enspace\\ &(1\le i \le m, 1\le s \le r-1)\end{align*} and 11 are linearly independent over KK. The essential ingredient is our term-wise formal construction of type II of Pad\'e approximants together with new non-vanishing argument for the generalized Wronskian.

Keywords

Cite

@article{arxiv.2203.00207,
  title  = {Generalized hypergeometric $G$-functions take linear independent values},
  author = {Sinnou David and Noriko Hirata-Kohno and Makoto Kawashima},
  journal= {arXiv preprint arXiv:2203.00207},
  year   = {2022}
}

Comments

28 pages. arXiv admin note: text overlap with arXiv:2010.09167

R2 v1 2026-06-24T09:57:18.092Z