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The Lerch zeta function I. Zeta integrals

The Lerch zeta function I. Zeta integrals Abstract.This is the first of four papers that study algebraic andanalytic structures associated to the Lerch zeta function.This paper studies “zeta integrals” associated to the Lerch zeta functionusing test functions, and obtains functional equations for them. Special cases includea pair of symmetrized four-term functional equationsfor combinations of Lerch zeta functions,found by A. Weil, for real parameters (a,c)$(a,c)$ with 0<a,c<1$0&lt; a, c&lt; 1$.It extends these functions to real a$a$ and c$c$,and studies limiting cases of these functions where at least one of a$a$ and c$c$take the values 0 or 1. A main feature is thatas a function of three variables (s,a,c)$(s, a, c)$, in which a$a$ and c$c$ are real,the Lerch zeta function has discontinuities at integer values ofa$a$ and c$c$. For fixed s$s$,the function (s,a,c)$\zeta (s,a,c)$ is discontinuous on part of the boundary of theclosed unit square in the (a,c)$(a,c)$-variables, and thelocation and nature of these discontinuities depend onthe real part (s)$\Re (s)$ of s$s$. Analysis of this behavior is used to determinemembership of these functions in Lp([0,1]2,dadc)$L^p([0,1]^2, da\,dc)$for 1p<$1 \le p &lt; \infty $, as a function of (s)$\Re (s)$. The paper also definesgeneralized Lerch zeta functions associated to the oscillator representation,and gives analogous four-term functional equations for them. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Forum Mathematicum de Gruyter

The Lerch zeta function I. Zeta integrals

Forum Mathematicum , Volume 24 (1): 48 – Jan 19, 2012

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References (44)

Publisher
de Gruyter
Copyright
© 2012 by Walter de Gruyter Berlin Boston
ISSN
0933-7741
eISSN
1435-5337
DOI
10.1515/form.2011.047
Publisher site
See Article on Publisher Site

Abstract

Abstract.This is the first of four papers that study algebraic andanalytic structures associated to the Lerch zeta function.This paper studies “zeta integrals” associated to the Lerch zeta functionusing test functions, and obtains functional equations for them. Special cases includea pair of symmetrized four-term functional equationsfor combinations of Lerch zeta functions,found by A. Weil, for real parameters (a,c)$(a,c)$ with 0<a,c<1$0&lt; a, c&lt; 1$.It extends these functions to real a$a$ and c$c$,and studies limiting cases of these functions where at least one of a$a$ and c$c$take the values 0 or 1. A main feature is thatas a function of three variables (s,a,c)$(s, a, c)$, in which a$a$ and c$c$ are real,the Lerch zeta function has discontinuities at integer values ofa$a$ and c$c$. For fixed s$s$,the function (s,a,c)$\zeta (s,a,c)$ is discontinuous on part of the boundary of theclosed unit square in the (a,c)$(a,c)$-variables, and thelocation and nature of these discontinuities depend onthe real part (s)$\Re (s)$ of s$s$. Analysis of this behavior is used to determinemembership of these functions in Lp([0,1]2,dadc)$L^p([0,1]^2, da\,dc)$for 1p<$1 \le p &lt; \infty $, as a function of (s)$\Re (s)$. The paper also definesgeneralized Lerch zeta functions associated to the oscillator representation,and gives analogous four-term functional equations for them.

Journal

Forum Mathematicumde Gruyter

Published: Jan 19, 2012

Keywords: Functional equation; Hurwitz zeta function; Lerch zeta function; periodic zeta function

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