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Dynamical Zeta Function for Several Strictly Convex Obstacles

Published online by Cambridge University Press:  20 November 2018

Vesselin Petkov*
Affiliation:
Département de Mathématiques Appliquées, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France e-mail: petkov@math.u-bordeaux1.fr
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Abstract

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The behavior of the dynamical zeta function ${{Z}_{D}}(s)$ related to several strictly convex disjoint obstacles is similar to that of the inverse $Q(s)\,=\,\frac{1}{\zeta (s)}$ of the Riemann zeta function $\zeta \left( s \right)$ . Let $\prod \left( s \right)$ be the series obtained from ${{Z}_{D}}(s)$ summing only over primitive periodic rays. In this paper we examine the analytic singularities of ${{Z}_{D}}(s)$ and $\prod \left( s \right)$ close to the line $\Re s={{s}_{2}},$ where ${{s}_{2}}$ is the abscissa of absolute convergence of the series obtained by the second iterations of the primitive periodic rays. We show that at least one of the functions ${{Z}_{D}}(s),$ $\prod \left( s \right)$ has a singularity at $s\,=\,{{s}_{2}}$ .

Information

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2008