Ratio Asymptotic of Hermite-Pad\'e Orthogonal Polynomials for Nikishin Systems. II

Abstract

We prove ratio asymptotic for sequences of multiple orthogonal polynomials with respect to a Nikishin system of measures ${\mathcal{N}}(\sigma_1,...,\sigma_m)$ such that for each $k$, the support of $\sigma_k$ consists of an interval $\widetilde{\Delta}_k$, on which $\sigma_k^{\prime} > 0$ almost everywhere, and a set without accumulation points in $\mathbb{R} \setminus \widetilde{\Delta}_k$.