“…is symmetric positive definite, the matrix A is almost positive definite provided that D The following lemma, originally proved in [20,28] and recently re-stated in [6], describes the eigenvalue distributions of the Toeplitz matrices T (i) (i = 1, 2, 3); see also [27]. The results follow directly from the fact that the generating functions of T (1) , T (2) and T (3) are ıθ, θ 2 and ıθ 3 , respectively.…”