Category Of C-Motives Over Finite Fields
arXiv:1810.11941 · doi:10.1016/j.jnt.2020.06.015
Abstract
In this article we introduce and study a motivic category in the arithmetic of function fields, namely the category of motives over an algebraic closure of a finite field with coefficients in a global function field over this finite field. It is semi-simple, non-neutral Tannakian and possesses all the expected fiber functors. This category generalizes the previous construction due to Anderson and is more relevant for applications to the theory of -Shtukas, such as formulating the analog of the Langlands-Rapoport conjecture over function fields. We further develop the analogy with the category of motives over with coefficients in for which the existence of the expected fiber functors depends on famous unproven conjectures.