T. W. Körner’s Fourier Analysis is a rigorous, example-rich resource ideal for mathematically mature readers who want a deep understanding of Fourier series and transforms. It rewards careful study and is an excellent complement to both applied texts and measure-theoretic treatments.
If you have finally secured a copy—be it a legitimate PDF, a library scan, or a dog-eared paperback—the hardest part begins: actually learning Fourier analysis. Körner is dense. Here is a survival strategy: fourier analysis t w korner pdf