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arXiv 1902.10380math.NT
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关于Drinfeld模周期的域扩张

On field extensions given by periods of Drinfeld modules

Andreas Maurischat

摘要:

在这篇短文中,我们回答了M. Papikian关于秩为2的Drinfeld模的邻接周期所给出的$K_\infty$的扩展度的一个普遍上界。我们表明,相反的秩1的情况下,这样一个普遍的上界是不存在的,证明推广到更高的秩。此外,我们给出了一个上,下界的扩张度依赖于定义系数的Drinfeld模的赋值。特别是,下界表明不存在一个普遍的上界。

英文摘要:

In this short note, we answer a question raised by M. Papikian on a universal upper bound for the degree of the extension of $K_\infty$ given by adjoining the periods of a Drinfeld module of rank 2. We show that contrary to the rank 1 case such a universal upper bound does not exist, and the proof generalises to higher rank. Moreover, we give an upper and lower bound for the extension degree depending on the valuations of the defining coefficients of the Drinfeld module. In particular, the lower bound shows the non-existence of a universal upper bound.

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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