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HYPERTRANSCENDENCE OF $L$-FUNCTIONS FOR $\text{GL}_{m}(\mathbb{A}_{\mathbb{Q}})$

Part of: Differential equations in the complex domain Zeta and $L$-functions: analytic theory

Published online by Cambridge University Press:  11 November 2015

HIROFUMI NAGOSHI
HIROFUMI NAGOSHI*
Affiliation:
Faculty of Science and Technology, Gunma University, Kiryu, Gunma, 376-8515, Japan email nagoshi@gunma-u.ac.jp
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Abstract

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We generalise a result of Hilbert which asserts that the Riemann zeta-function ${\it\zeta}(s)$ is hypertranscendental over $\mathbb{C}(s)$. Let ${\it\pi}$ be any irreducible cuspidal automorphic representation of $\text{GL}_{m}(\mathbb{A}_{\mathbb{Q}})$ with unitary central character. We establish a certain type of functional difference–differential independence for the associated $L$-function $L(s,{\it\pi})$. This result implies algebraic difference–differential independence of $L(s,{\it\pi})$ over $\mathbb{C}(s)$ (and more strongly, over a certain field ${\mathcal{F}}_{s}$ which contains $\mathbb{C}(s)$). In particular, $L(s,{\it\pi})$ is hypertranscendental over $\mathbb{C}(s)$. We also extend a result of Ostrowski on the hypertranscendence of ordinary Dirichlet series.

Keywords

hypertranscendencedifference–differential independenceL-functionDirichlet series

MSC classification

Primary: 11M99: None of the above, but in this section
Secondary: 34M15: Algebraic aspects (differential-algebraic, hypertranscendence, group-theoretical)
Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 93 , Issue 3 , June 2016 , pp. 388 - 399
Copyright
© 2015 Australian Mathematical Publishing Association Inc. 

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