Zeta and L functions of Voevodsky motives

TL;DR

This paper introduces a new L-function associated with Voevodsky motives over global fields, establishing its properties such as Euler product, rationality, and functional equation, extending classical zeta and L-function theory to motives.

Contribution

It defines an L-function for motives over global fields, proves its key properties, and connects it with existing zeta functions, utilizing advanced motivic and categorical techniques.

Findings

L-function has an Euler product and converges in a half-plane.

For function fields, the L-function is rational in q^{-s} and satisfies a functional equation.

The L-function aligns with classical zeta functions at good reduction places.

Abstract

We associate an $L$-function $L^{\mathrm{near}}(M,s)$ to any geometric motive over a global field $K$ in the sense of Voevodsky. This is a Dirichlet series which converges in some half-plane and has an Euler product factorisation. When $M$ is the dual of $M(X)$ for $X$ a smooth projective variety, $L^{\mathrm{near}}(M,s)$ differs from the alternating product of the zeta functions defined by Serre in 1969 only at places of bad reduction; in exchange, it is multiplicative with respect to exact triangles. If $K$ is a function field over $\mathbf{F}_q$, $L{\mathrm{near}}(M,s)$ is a rational function in $q^{-s}$ and enjoys a functional equation. The techniques use the full force of Ayoub's six (and even seven) operations.