An orthogonal relation on inverse cyclotomic polynomials

Jianfeng Xie

Let ${\Phi }_n(X)$ and ${\Psi }_n(X)=\frac{X^n-1}{{\Phi }_n(X)}$ be the $n$-th cyclotomic and inverse cyclotomic polynomials respectively. In this short note, for any pair of divisors $ d_{1} \n…