Zeta-values of one-dimensional arithmetic schemes at strictly negative integers

Abstract

Let $X$ be an arithmetic scheme (i.e., separated, of finite type over $\mathrm{Spec}\mathbb{Z}$) of Krull dimension $1$. For the associated zeta function $\zeta (X,s)$, we write down a formula for the special value at $s=n<0$ in terms of the étale motivic cohomology of $X$ and a regulator. We prove it in the case when for each generic point $\eta \in X$ with $\mathrm{char}\kappa (\eta )=0$, the extension $\kappa (\eta )/\mathbb{Q}$ is abelian. We conjecture that the formula holds for any one-dimensional arithmetic scheme. This is a consequence of the Weil-étale formalism developed by the author in [arXiv:2012.11034] and [arXiv:2102.12114], following the work of Flach and Morin (Doc. Math. 23 (2018), 1425--1560). We also calculate the Weil-étale cohomology of one-dimensional arithmetic schemes and show that our special value formula is a particular case of the main conjecture from [arXiv:2102.12114].

29 pages, comments are welcome!

References in corpus (3)

• Topological Hochschild homology and Zeta-values
• Weil-étale cohomology and duality for arithmetic schemes in negative weights
• Weil-étale cohomology and zeta-values of arithmetic schemes at negative integers