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All but finitely many non-trivial zeros of the approximations of the Epstein zeta function are simple and on the critical line

Published online by Cambridge University Press:  25 February 2005

Haseo Ki
Affiliation:
Department of Mathematics, Yonsei University, Seoul 120–749, Korea. E-mail: haseo@yonsei.ac.kr
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Abstract

The Chowla–Selberg formula is applied in approximating a given Epstein zeta function. Partial sums of the series derive from the Chowla–Selberg formula, and although these partial sums satisfy a functional equation, as does an Epstein zeta function, they do not possess an Euler product. What we call partial sums throughout this paper may be considered as special cases concerning a more general function satisfying a functional equation only. In this article we study the distribution of zeros of the function. We show that in any strip containing the critical line, all but finitely many zeros of the function are simple and on the critical line. For many Epstein zeta functions we show that all but finitely many non-trivial zeros of partial sums in the Chowla–Selberg formula are simple and on the critical line.

Type
Research Article
Copyright
2005 London Mathematical Society

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All but finitely many non-trivial zeros of the approximations of the Epstein zeta function are simple and on the critical line
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