“…Now, we will give a very important result that indicates that matrix T n−1 (μ) has a simple structure [5] for any n. In particular, from above follows the completeness of the system of eigenfunctions of the operator A α,β γ for α = β = γ = 1/ρ, 0 < ρ < 2, which was established by other methods (see [1,2,8]). …”