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arXiv 0906.3728math.NT
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类数不可被素数$\ell$整除的函数域

Function Fields with Class Number Indivisible by a Prime $\ell$

Michael Daub, Jaclyn Lang, Mona Merling, Allison M. Pacelli, Natee Pitiwan, Michael Rosen

摘要:

已知无限多个任意次数的数域和函数域$m$具有可被给定整数$n$整除的类数。然而,很少有人知道这类字段的类号的不可分割性。虽然已知存在无穷多个二次数域,其类数与给定素数不可分,但这些域并没有明确构造,并且似乎对更高程度的扩展一无所知。在\cite{Pacelli-Rosen}中,Pacelli和Rosen明确地构造了一个无限类的函数域的任何程度$m$,$3 \nmid m$,在$\F_q(T)$与类数不可分的3,推广了一个结果的Ichimura二次扩张。在这里,我们推广的结果,建设,为任意素数$\ell$,和正整数$m > 1$,无穷多个功能领域的程度$m$的有理函数域,与类数不可分的$\ell$。

英文摘要:

It is known that infinitely many number fields and function fields of any degree $m$ have class number divisible by a given integer $n$. However, significantly less is known about the indivisibility of class numbers of such fields. While it's known that there exist infinitely many quadratic number fields with class number indivisible by a given prime, the fields are not constructed explicitly, and nothing appears to be known for higher degree extensions. In \cite{Pacelli-Rosen}, Pacelli and Rosen explicitly constructed an infinite class of function fields of any degree $m$, $3 \nmid m$, over $\F_q(T)$ with class number indivisible by 3, generalizing a result of Ichimura for quadratic extensions. Here we generalize that result, constructing, for an arbitrary prime $\ell$, and positive integer $m > 1$, infinitely many function fields of degree $m$ over the rational function field, with class number indivisible by $\ell$.

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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