Trigonometric Series (Cambridge Mathematical Library) - Tapa blanda

Originally published in 1935, Professor Zygmund's Trigonometric Series rapidly established itself as a classic and has remained one of the most referenced works of mathematics ever since. Originally published separately, the two volumes were subsequently bound together as a single book. Volume I contains the basic material on trigonometric series and Fourier analysis, including the summability of Fourier series, special trigonometric series, complex methods in Fourier series, and Riemann's theory of trigonometric series. Volume II covers trigonometric interpolation, differentiation of series, convergence and summability, Fourier integrals and other advanced topics.