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arXiv 1101.4255math.NT
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(逆)分圆多项式的最大间隔

Maximum Gap in (Inverse) Cyclotomic Polynomial

Hoon Hong, Eunjeong Lee, Hyang-Sook Lee, Cheol-Min Park

摘要:

令$g(f)$表示在多项式$f$中出现的两个连续指数之间的差(间隙)的最大值。令$Φ_n$表示$n$次分圆多项式,并且令$Ψ_n$表示$n$次逆分圆多项式。本文研究了$g(Φ_n)$和$g(Ψ_n)$,其中$n$是奇素数的乘积,如$p_1 < p_2 < p_3$等.确定$g(Φ_{p_1})$,$g(Ψ_{p_1})$和$g(Ψ_{p_1p_2})$是很容易的.因此,最简单的非平凡情况是$g(Φ_{p_1p_2})$和$g(Ψ_{p_1p_2p_3})$。我们给出了$g(Φ_{p_1p_2}).$的精确表达式。我们也给出了$g(Ψ_{p_1p_2p_3})$在温和条件下的精确表达式。该条件几乎总是满足的(只有有限例外的每个$p_1$)。我们还提供了一个下限和上限为$g(Ψ_{p_1p_2p_3})$。

英文摘要:

Let $g(f)$ denote the maximum of the differences (gaps) between two consecutive exponents occurring in a polynomial $f$. Let $Φ_n$ denote the $n$-th cyclotomic polynomial and let $Ψ_n$ denote the $n$-th inverse cyclotomic polynomial. In this note, we study $g(Φ_n)$ and $g(Ψ_n)$ where $n$ is a product of odd primes, say $p_1 < p_2 < p_3$, etc. It is trivial to determine $g(Φ_{p_1})$, $g(Ψ_{p_1})$ and $g(Ψ_{p_1p_2})$. Hence the simplest non-trivial cases are $g(Φ_{p_1p_2})$ and $g(Ψ_{p_1p_2p_3})$. We provide an exact expression for $g(Φ_{p_1p_2}).$ We also provide an exact expression for $g(Ψ_{p_1p_2p_3})$ under a mild condition. The condition is almost always satisfied (only finite exceptions for each $p_1$). We also provide a lower bound and an upper bound for $g(Ψ_{p_1p_2p_3})$.

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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