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arXiv 0712.2365math.NT
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具有大系数的三元分圆多项式

Ternary cyclotomic polynomials having a large coefficient

Yves Gallot, Pieter Moree

摘要:

令$Φ_n(x)$表示$n$次分圆多项式。在1968年修女马里昂贝特证明$a_n(k)$,系数$x^k$在$Φ_n(x)$,满足$|a_n(k)|\le (p+1)/2$的情况下$n=pqr$与$p<q<r$素数(在这种情况下$Φ_n(x)$被称为是三元)。从那时起,一些结果对建立她的猜想已被证明(例如$|a_n(k)|\le 3p/4$)。然而,在这里我们证明,Beiter的猜想对每一个$p\ge 11$都是假的。我们还证明了,给定任何$ε>0$有无限多个三元组$(p_j,q_j,r_j)$与$p_1<p_2<... $连续素数,使$|a_{p_jq_jr_j}(n_j)|>(2/3-ε)p_j$为$j\ge 1$。

英文摘要:

Let $Φ_n(x)$ denote the $n$th cyclotomic polynomial. In 1968 Sister Marion Beiter conjectured that $a_n(k)$, the coefficient of $x^k$ in $Φ_n(x)$, satisfies $|a_n(k)|\le (p+1)/2$ in case $n=pqr$ with $p<q<r$ primes (in this case $Φ_n(x)$ is said to be ternary). Since then several results towards establishing her conjecture have been proved (for example $|a_n(k)|\le 3p/4$). Here we show that, nevertheless, Beiter's conjecture is false for every $p\ge 11$. We also prove that given any $ε>0$ there exist infinitely many triples $(p_j,q_j,r_j)$ with $p_1<p_2<... $ consecutive primes such that $|a_{p_jq_jr_j}(n_j)|>(2/3-ε)p_j$ for $j\ge 1$.

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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