English

Large values of Dirichlet $L$- functions inside the critical strip

Number Theory 2018-04-17 v2

Abstract

In the present paper, we study large values of Dirichlet LL- functions inside the critical strip. For every 1/2<σ<11/2<\sigma<1, we show that for qq sufficiently large, there exists a non-principal character χ\chi modulo qq and a constant c(σ)>0c(\sigma)>0 such that logL(σ,χ)c(σ)(logq)1σ(loglogq)σ\log \vert L(\sigma,\chi)\vert \gg c(\sigma)(\log q)^{1-\sigma}(\log\log q)^{-\sigma}. This matches the believed prediction for these values which was previously known only for the Riemann zeta function since Montgomery, or conditionally on GRH for quadratic LL- functions due to Lamzouri. In a recent work involving the author, a new implementation of the resonance method was presented in order to exhibit large values of the Riemann zeta function on the line (s)=1\Re(s)=1. We show how to adapt the argument to our setting.

Keywords

Cite

@article{arxiv.1803.03836,
  title  = {Large values of Dirichlet $L$- functions inside the critical strip},
  author = {Marc Munsch},
  journal= {arXiv preprint arXiv:1803.03836},
  year   = {2018}
}

Comments

A joint version has been prepared with the article arXiv:1803.00760 in order to get a complete treatment of $L$ -functions in the strip $(1/2,1)$. Thus, the paper arXiv:1803.00760 has been updated with the current author and contains the content of the present paper