Verlag der Ungarischen Akademie der Wissenschaften, Budapest, 1960
€ 30,00
24 x 18 cm, cloth hardcover with dust jacket, 308 pages, Text in German, dust jacket with a few small tears, slightly browned, very good condition, see picture.
Standard reference work on convergence problems of orthogonal series. Important monograph in approximation theory and functional analysis, widely cited in mathematical literature.
