1987 / 1-2. szám Bognár M.: On axiomatization of the theory of linking Hermann T. - Kis O. - Vértesi P.: On certain rational interpolatory operators Nagy B.: Spectral measures with singularities Sebestyén Z.: Operator moment theorems for C+-algebras Nanda, S.: Strongly almost summable and strongly almost convergent sequences Yoneda, K.: A note on convergence of Walsh-Fourier series of a function on a class V Dhompongsa, S.: Almost sure invariance principles for the empirical process of lacunary sequences Dryanov, D. P.: On the convergence and saturation problem of a sequence of discrete linear operators of exponential type in Lp(-, ) spaces Vy, Duong Thuy: A fifth-order iterative method ...