TY - GEN AU - Okuyama,Yasuo TI - Absolute summability of Fourier series and orthogonal series T2 - Lecture notes in mathematics SN - 0387133550 (U.S.) U1 - 510 s515/.2433 PY - 1984/// CY - Berlin, New York PB - Springer-Verlag KW - Fourier series KW - Series, Orthogonal KW - Summability theory N1 - Includes index ER -