On the height of cyclotomic polynomials

Details On the height of cyclotomic polynomials On the height of cyclotomic polynomials

2010-12-17

arxiv.org/abs/1012.3897v1

Acta Arith. 152 (2012), 349-359

Mathematics

Number Theory

11 pages

Scientific paper

Let $A_n$ denote the height of cyclotomic polynomial $\Phi_n$, where $n$ is a product of $k$ distinct odd primes. We prove that $A_n \le \epsilon_k\phi(n)^{k^{-1}2^{k-1}-1}$ with $-\log\epsilon_k\sim c2^k$, $c>0$. The same statement is true for the height $C_n$ of the inverse cyclotomic polynomial $\Psi_n$. Additionally, we improve on a bound of Kaplan for the maximal height of divisors of $x^n-1$, denoted by $B_n$. We show that $B_n<\eta_k n^{(3^k-1)/(2k)-1}$, with $-\log \eta_k \sim c3^k$ and the same $c$.

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