ISBN-13: 9780821847909 / Angielski / Twarda / 2009 / 433 str.
Folland presents the theory and applications of Fourier series and integrals, eigenfunction expansions, and related topics, on a level suitable for undergraduates. It uses ideas from modern analysis to develop the concepts and reasoning behind the techniques without getting bogged down in the technicalities of rigorous proofs.