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arXiv 2503.06110math.NTmath.DS
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形式级数域中的精确逼近

Exact Approximation In The Field Of Formal Series

Department of Mathematics, IIT Bombay(印度理工学院孟买分校数学系)

Aratrika Pandey

AI总结:

本文确定了正特征局部域上精确ψ-可逼近向量的Hausdorff维数,将Bandi和de Saxcé的实数结果推广到函数域及高维情形。

摘要:

本文确定了正特征局部域上精确$ψ$-可逼近向量集合的Hausdorff维数。该结果是Bandi和de Saxcé在实数情形下近期定理~\cite{bandi2023hausdorff}的函数域类比,并将Zhang~\cite{MR2834892}的主要定理推广到高维。我们的方法将Bandi和de Saxcé的技巧适应于超度量情形,从而克服了高维有理函数因缺乏良好分离性质所带来的困难。

英文摘要:

In this article, we determine the Hausdorff dimension of the set of exactly $ψ$-approximable vectors over local fields of positive characteristic. This result is the function field analogue of a recent theorem of Bandi and de Saxcé in the real setting~\cite{bandi2023hausdorff}, and extends the main theorem of Zhang~\cite{MR2834892} to higher dimensions. Our approach adapts the method of Bandi and de Saxcé to the ultrametric setting, enabling us to overcome difficulties arising from the failure of the well-separatedness property for rational functions in higher dimensions.

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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