arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1507.00622math.AGmath.NT
收藏

关于有限域上双曲曲线的尖点化问题

On the cuspidalization problem for hyperbolic curves over finite fields

Yasuhiro Wakabayashi

摘要:

本文研究了有限域上双曲曲线的算术基本群的群论构造。本文的一个主要结果是:去掉一个给定点后,双曲曲线的几何pro- $l$基本群之间的任何Frobenius保持同构都诱导去掉其它点后得到的双曲曲线的几何pro- $l$基本群之间的同构.最后,我们应用这一结果,以获得有关某些尖点化问题的基本群(不一定是正确的)双曲曲线在有限域。

英文摘要:

In this paper, we study some group-theoretic constructions associated to arithmetic fundamental groups of hyperbolic curves over finite fields. One of the main results of this paper asserts that any Frobenius-preserving isomorphism between the geometrically pro-$l$ fundamental groups of hyperbolic curves with one given point removed induces an isomorphism between the geometrically pro-$l$ fundamental groups of the hyperbolic curves obtained by removing other points. Finally, we apply this result to obtain results concerning certain cuspidalization problems for fundamental groups of (not necessarily proper) hyperbolic curves over finite fields.

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。

↑