functions of bounded p-fluctuation Absolute Convergence of Single and Double Fourier Series on Multiplicative Systems Authors: Volosivets S. S. Two-dimensional analogs of famous Zygmund and Szasz tests for absolute convergence of Fourier – Vilenkin series are established. Also it is proved that two-dimensional Szasz test is the best possible in the certain sense. Read more about Absolute Convergence of Single and Double Fourier Series on Multiplicative Systems
