中文

关于$L(\sigma,\chi)$的大值

数论 2018-11-20 v3

摘要

近年来发展了一种共振方法的变体,使得能够获得黎曼 zeta 函数在临界带内竖直线上的改进Ω\Omega结果。在本文中我们展示如何将该方法改造以证明在σ(1/2,1]\sigma \in (1/2,1]范围内L(σ,χ)|L(\sigma, \chi)|大值的存在性,并估计具有此类大阶L(σ,χ)|L(\sigma, \chi)|的特征标比例。更确切地说,对每个固定的σ(1/2,1)\sigma \in (1/2,1),我们证明对所有足够大的qq,存在一个非主特征标χ\chi(mod qq)使得logL(σ,χ)C(σ)(logq)1σ(loglogq)σ\log |L(\sigma,\chi)| \geq C(\sigma) (\log q)^{1-\sigma} (\log \log q)^{-\sigma}。在σ=1\sigma=1的情形,我们证明存在一个非主特征标χ\chi(mod qq)使得L(1,χ)eγ(log2q+log3qC)|L(1,\chi)| \geq e^\gamma \left(\log_2 q + \log_3 q - C \right)。在两种情形中,我们的结果本质上与基于概率模型对此类极值实际阶的预测相符。

关键词

引用

@article{arxiv.1803.00760,
  title  = {On large values of $L(\sigma,\chi)$},
  author = {Christoph Aistleitner and Kamalakshya Mahatab and Marc Munsch and Alexandre Peyrot},
  journal= {arXiv preprint arXiv:1803.00760},
  year   = {2018}
}

备注

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