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arXiv 1707.02501math.NT
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动力多项式族中的伽罗瓦群

Galois groups in a family of dynatomic polynomials

David Krumm

摘要:

对于每个非常数多项式$f\in\mathbb Q[x]$,令$Φ_{4,f}$表示$f$的第四动力学多项式。本文确定了伽罗瓦群的结构和$Φ_{4,f}$对每个二次多项式$f$的不可约因子的次数。作为应用,我们证明了Morton和Silverman关于一致有界性猜想的新结果。特别是,我们表明,如果$f$是一个二次多项式,然后,超过$39\%$的所有素数$p$,$f$没有一个点的周期4在$\mathbb Q_p$。

英文摘要:

For every nonconstant polynomial $f\in\mathbb Q[x]$, let $Φ_{4,f}$ denote the fourth dynatomic polynomial of $f$. We determine here the structure of the Galois group and the degrees of the irreducible factors of $Φ_{4,f}$ for every quadratic polynomial $f$. As an application we prove new results related to a uniform boundedness conjecture of Morton and Silverman. In particular we show that if $f$ is a quadratic polynomial, then, for more than $39\%$ of all primes $p$, $f$ does not have a point of period four in $\mathbb Q_p$.

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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