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arXiv 1907.04594math.NT
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关于有限域上单阿贝尔簇的若干同构类

On a number of isogeny classes of simple abelian varieties over finite fields

Jungin Lee

摘要:

本文研究了有限域$\mathbb{F}_q$上维数为$g$的单阿贝尔簇的同构类的个数$s_q(g)$的渐近性态.证明了$s_q(g)$的对数渐近性与$\mathbb{F}_q$上所有维数为$g$的阿贝尔簇的同构类个数$m_q(g)$的对数渐近性相同.这表明对于足够大的$$ \limsup_{g \rightarrow \infty} \frac{s_q(g)}{m_q(g)}=1. $$,在维度为$g$的$\mathbb{F}_q$上有比非简单类多得多的阿贝尔簇的简单同构类,这可以理解为与Lipnowski和Tsimerman的主要结果相反的情况(杜克数学167:3403-3453,2018)。

英文摘要:

In this paper, we investigate the asymptotic behavior of the number $s_q(g)$ of isogeny classes of simple abelian varieties of dimension $g$ over a finite field $\mathbb{F}_q$. We prove that the logarithmic asymptotic of $s_q(g)$ is the same as the logarithmic asymptotic of the number $m_q(g)$ of isogeny classes of all abelian varieties of dimension $g$ over $\mathbb{F}_q$. We also prove that $$ \limsup_{g \rightarrow \infty} \frac{s_q(g)}{m_q(g)}=1. $$ This suggests that there are much more simple isogeny classes of abelian varieties over $\mathbb{F}_q$ of dimension $g$ than non-simple ones for sufficiently large $g$, which can be understood as the opposite situation to a main result of Lipnowski and Tsimerman (Duke Math 167:3403-3453, 2018).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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