Invariant factors from products of cyclotomic polynomials, with applications

Vanni Noferini, Gerald Williams

Let $f,g\in \mathbb{Z}[t]$ be products of cyclotomic polynomials such that either $g/\gcd (f,g)$ or $f/\gcd (f,g)$ (or both) is squarefree. We give explicit formulae for the invariant…