On a Birch and Swinnerton-Dyer type conjecture for the Hasse-Weil-Artin $L$-functions in characteristic $p>0$

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Hauptverfasser: Kim, Wansu, Tan, Ki-Seng, Trihan, Fabien, Tsoi, Kwok-Wing
Format: Preprint
Veröffentlicht: 2024
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author Kim, Wansu
Tan, Ki-Seng
Trihan, Fabien
Tsoi, Kwok-Wing
author_facet Kim, Wansu
Tan, Ki-Seng
Trihan, Fabien
Tsoi, Kwok-Wing
contents Given an abelian variety $A$ over a global function field $K$ of characteristic $p>0$ and an irreducible complex continuous representation $ψ$ of the absolute Galois group of $K$, we obtain a BSD-type formula for the leading term of Hasse--Weil--Artin $L$-function for $(A,ψ)$ at $s=1$ under certain technical hypotheses. The formula we obtain can be applied quite generally; for example, it can be applied to the $p$-part of the leading term even when $ψ$ is weakly wildly ramified at some place under additional hypotheses. Our result is the function field analogue of the work of D. Burns and D. Macias Castillo, built upon the work on the equivariant refinement of the BSD conjecture by D. Burns, M. Kakde and the first-named author. To handle the $p$-part of the leading term, we need the Riemann--Roch theorem for equivariant vector bundles on a curve over a finite field generalising the work of S. Nakajima, B. Köck, and H. Fischbacher-Weitz and B. Köck, which is of independent interest.
format Preprint
id arxiv_https___arxiv_org_abs_2411_12404
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle On a Birch and Swinnerton-Dyer type conjecture for the Hasse-Weil-Artin $L$-functions in characteristic $p>0$
Kim, Wansu
Tan, Ki-Seng
Trihan, Fabien
Tsoi, Kwok-Wing
Number Theory
11G40, 14G10, 11J95, 14C40
Given an abelian variety $A$ over a global function field $K$ of characteristic $p>0$ and an irreducible complex continuous representation $ψ$ of the absolute Galois group of $K$, we obtain a BSD-type formula for the leading term of Hasse--Weil--Artin $L$-function for $(A,ψ)$ at $s=1$ under certain technical hypotheses. The formula we obtain can be applied quite generally; for example, it can be applied to the $p$-part of the leading term even when $ψ$ is weakly wildly ramified at some place under additional hypotheses. Our result is the function field analogue of the work of D. Burns and D. Macias Castillo, built upon the work on the equivariant refinement of the BSD conjecture by D. Burns, M. Kakde and the first-named author. To handle the $p$-part of the leading term, we need the Riemann--Roch theorem for equivariant vector bundles on a curve over a finite field generalising the work of S. Nakajima, B. Köck, and H. Fischbacher-Weitz and B. Köck, which is of independent interest.
title On a Birch and Swinnerton-Dyer type conjecture for the Hasse-Weil-Artin $L$-functions in characteristic $p>0$
topic Number Theory
11G40, 14G10, 11J95, 14C40
url https://arxiv.org/abs/2411.12404