## Illinois Journal of Mathematics

### Maximal height of divisors of $x\sp n-1$

#### Abstract

The size of the coefficients of cyclotomic polynomials is a problem that has been well-studied. This paper investigates the following generalization: suppose $f(x)\in\mathbb{Z}[x]$ is a divisor of $x^n-1$, so that $f(x)$ is the product of the cyclotomic polynomials corresponding to some of the divisors of $n$. We ask about the largest coefficient in absolute value over all such divisors $f(x)$ of $x^n-1$, obtaining a fairly tight estimate for the maximal order of this function.

#### Article information

Source
Illinois J. Math., Volume 51, Number 2 (2007), 597-604.

Dates
First available in Project Euclid: 13 November 2009

https://projecteuclid.org/euclid.ijm/1258138432

Digital Object Identifier
doi:10.1215/ijm/1258138432

Mathematical Reviews number (MathSciNet)
MR2342677

Zentralblatt MATH identifier
1211.11108

#### Citation

Pomerance, Carl; Ryan, Nathan C. Maximal height of divisors of $x\sp n-1$. Illinois J. Math. 51 (2007), no. 2, 597--604. doi:10.1215/ijm/1258138432. https://projecteuclid.org/euclid.ijm/1258138432