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BETWEEN THE PROBLEMS OF PÓLYA AND TURÁN

Part of: Computational number theory Zeta and $L$-functions: analytic theory Multiplicative number theory

Published online by Cambridge University Press:  27 September 2012

MICHAEL J. MOSSINGHOFF  and
TIMOTHY S. TRUDGIAN
MICHAEL J. MOSSINGHOFF*
Affiliation:
Department of Mathematics, Davidson College, Davidson, NC, 28035-6996, USA (email: [email protected])
TIMOTHY S. TRUDGIAN
Affiliation:
Department of Mathematics and Computer Science, University of Lethbridge, Alberta, Canada T1K 3M4 (email: [email protected])
*
✉For correspondence; e-mail: [email protected]
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Abstract

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We investigate the behaviour of the function $L_{\alpha }(x) = \sum _{n\leq x}\lambda (n)/n^{\alpha }$, where $\lambda (n)$ is the Liouville function and $\alpha $ is a real parameter. The case where $\alpha =0$ was investigated by Pólya; the case $\alpha =1$, by Turán. The question of the existence of sign changes in both of these cases is related to the Riemann hypothesis. Using both analytic and computational methods, we investigate similar problems for the more general family $L_{\alpha }(x)$, where $0\leq \alpha \leq 1$, and their relationship to the Riemann hypothesis and other properties of the zeros of the Riemann zeta function. The case where $\alpha =1/2$is of particular interest.

Keywords

Liouville functionRiemann hypothesisPólya’s problemTurán’s problem

MSC classification

Secondary: 11M26: Nonreal zeros of $zeta (s)$ and $L(s, chi)$; Riemann and other hypotheses 11N64: Other results on the distribution of values or the characterization of arithmetic functions 11Y35: Analytic computations
Type
Research Article
Information
Journal of the Australian Mathematical Society , Volume 93 , Issue 1-2 , October 2012 , pp. 157 - 171
Copyright
Copyright © 2012 Australian Mathematical Publishing Association Inc.

Footnotes

Dedicated to the memory of Alf van der Poorten

References

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