On large values of $L(��,��)$

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Bibliographic Details
Title: On large values of $L(��,��)$
Authors: Aistleitner, Christoph, Mahatab, Kamalakshya, Munsch, Marc, Peyrot, Alexandre
Publisher Information: arXiv, 2018.
Publication Year: 2018
Subject Terms: 11M06, FOS: Mathematics, Number Theory (math.NT)
Description: In recent years a variant of the resonance method was developed which allowed to obtain improved $��$-results for the Riemann zeta function along vertical lines in the critical strip. In the present paper we show how this method can be adapted to prove the existence of large values of $|L(��, ��)|$ in the range $��\in (1/2,1]$, and to estimate the proportion of characters for which $|L(��, ��)|$ is of such a large order. More precisely, for every fixed $��\in (1/2,1)$ we show that for all sufficiently large $q$ there is a non-principal character $��$ (mod $q$) such that $\log |L(��,��)| \geq C(��) (\log q)^{1-��} (\log \log q)^{-��}$. In the case $��=1$ we show that there is a non-principal character $��$ (mod $q$) for which $|L(1,��)| \geq e^��\left(\log_2 q + \log_3 q - C \right)$. In both cases, our results essentially match the prediction for the actual order of such extreme values, based on probabilistic models.
15 pages. Version 2: This article has been merged with arXiv:1803.03836 and now also contains results for the case $\sigma \in (1/2,1)$. Marc Munsch has been added as a co-author of the paper. Version 3: Minor changes, taking into account the referee's recommendations. This paper will appear in Q. J. Math
Document Type: Article
DOI: 10.48550/arxiv.1803.00760
Rights: arXiv Non-Exclusive Distribution
Accession Number: edsair.doi...........7cda224743ea0e6fcab87bf6f3cd447d
Database: OpenAIRE
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