EN
Classes of functions and Fourier series
4.1. Inequalities
4.2. Mean convergence. The Riesz-Fischer theorem.
4.3. Classes B, C, S, and $L_φ$ of functions.
4.4. Parseval's relations.
4.5. Linear operations.
4.6. Transformations of Fourier series.
4.7. Miscellaneous theorems and examples.