English

Honda-Tate theory for log abelian varieties over finite fields

Number Theory 2024-04-26 v1

Abstract

In this article we study the Honda-Tate theory for log abelian varieties over an fs log point S=(Spec(k),MS)S=(\mathrm{Spec}(\mathbf{k}),M_S) for k=Fq\mathbf{k}=\mathbb{F}_q a finite field, generalizing the classical Honda-Tate theory for abelian varieties over k\mathbf{k}. For the standard log point SS, we give a complete description of the isogeny classes of such log abelian varieties using Weil qq-numbers of weight 0,1, and 2. In the general case where MSM_S admits a global chart PkP\to\mathbf{k} with P=NkP=\mathbb{N}^k, we also give a complete description of simple isogeny classes of log abelian varieties over SS in terms of rational points in generalized simplices.

Keywords

Cite

@article{arxiv.2404.16639,
  title  = {Honda-Tate theory for log abelian varieties over finite fields},
  author = {Xiaoyu Zhang and Heer Zhao},
  journal= {arXiv preprint arXiv:2404.16639},
  year   = {2024}
}