TY - BOOK AU - Okuyama,Yasuo TI - Absolute summability of Fourier series and orthogonal series T2 - Lecture notes in mathematics SN - 0387133550 PY - 1984/// CY - Berlin , New York PB - Springer-Verlag KW - Fourier series KW - Series, Orthogonal KW - Summability theory N1 - Includes index; Bibliography: p. [113]-117 ER -