题目：An approximate form of Artin's holomorphy conjecture and nonvanishing of Artin $L$-functions
摘要：Let $p$ be a prime, and let $\mathscr{F}_p(Q)$ be the set of number fields $F$ with $[F:\mathbb{Q}]=p$ with absolute discriminant $D_F\leq Q$. Let $\zeta(s)$ be the Riemann zeta function, and for $F\in\mathscr{F}_p(Q)$, let $\zeta_F(s)$ be the Dedekind zeta function of $F$. The Artin $L$-function $\zeta_F(s)/\zeta(s)$ is expected to be automorphic and satisfy GRH, but in general, it is not known to exhibit an analytic continuation past $\mathrm{Re}(s)=1$. I will describe new work which unconditionally shows that for all $\epsilon>0$ and all except $O_{p,\epsilon}(Q^{\epsilon})$ of the $F\in\mathscr{F}_p(Q)$, $\zeta_F(s)/\zeta(s)$ analytically continues to a region in the critical strip containing the box $[1-\epsilon/(20(p!)),1]\times [-D_F,D_F]$ and is nonvanishing in this region. This result is a special case of something more general. I will describe some applications to class groups (extremal size, $\ell$-torsion) and the distribution of periodic torus orbits (in the spirit of Einsiedler, Lindenstrauss, Michel, and Venkatesh). This talk is based on joint work with Robert Lemke Oliver and Asif Zaman.
报告人：Jesse Thorner 教授（University of Illinois, Urbana-Champaign）
时间：2021年3月11日，星期四，10:30-11:30
