“…Similarly, B(τ, ρ) is a weighted L-matrix with the power weight n (τ −ρ)/2 , and this structure, together with the homogeneity (1.5), makes it quite special. Particular cases of B(τ, ρ) have been studied in the already mentioned papers [4,19,5,2]. The homogeneity of B tempts one to compare its properties with the properties of the integral operator with the kernel function defined by the the same formula, see the discussion in [2,16,5].…”