International Association
for Cryptologic Research

Let $P(x, y)$ be a bivariate polynomial with coefficients in $\mathbb{C}$. Form the $n \times n$ matrices $L_n$ whose elements are defined by $P(i, j)$. Define the matrices $M_n = I_n - L_n $.

We show that $\mu_n = \det(M_n)$ is a polynomial in $n$, thus answering a conjecture of Naccache and Yifrach.