Book "Anferov P . and . Mathematics. The Fourier series and Fourier integral, written by a team of authors, is a fascinating and deep immersion into the world of mathematical analysis that will be of interest to both students and teachers, as well as to anyone who seeks to expand their knowledge in the field of mathematical methods. This work not only reveals the basic principles of Fourier series and integrals, but also demonstrates their practical application in various fields of science and technology. The book focuses on the Fourier series, a powerful tool that allows periodic functions to be decomposed into an infinite series of sinusoidal and cosineoidal functions. The authors explain in detail how these series can be used to analyze signals, solve differential equations, and even in image processing. The Fourier integral, in turn, opens the door to a world of continuous functions and their spectral analysis, which makes this topic especially relevant in the era of digital technologies and big data. The book will be of interest to students of technical and natural sciences, graduate students, as well as teachers who are looking for high-quality and affordable material for studying and teaching this important topic. It will be an excellent help for those who want to deepen their knowledge in mathematics and learn how to apply the theory in practice. Due to the clear and logical presentation of the material, the book is suitable for both self-study and for use in the educational process. The topics raised in the book cover not only theoretical aspects, but also practical examples, which makes the material more lively and understandable. The authors pay attention to various methods and approaches that allow solving problems related to Fourier series and integrals . This makes the book not just a textbook, but a real guide to mathematical analysis that will help readers see how abstract concepts can be applied in real life. The style of the authors is characterized by accessibility and clarity of presentation, which makes it easy to assimilate even the most complex ideas. The book is replete with illustrations and examples, which makes the learning process more visual and engaging. This is especially important for readers who may find it difficult to learn mathematical concepts. In addition, the team of authors includes experienced teachers and researchers who have made a significant contribution to the development of mathematical science. Their previous work and research in mathematical analysis, function theory, and applied mathematics make this book a valuable resource for anyone interested in these topics. If you are looking for a high-quality and up-to-date mathematics textbook that will help you understand the ranks and integrals of Fourier, then "Anferov P. and . Mathematics. Fourier series and Fourier integral" will be the perfect choice. This book will not only expand your knowledge, but also inspire further research in mathematics and its applications. Do not miss the opportunity to immerse yourself in the fascinating world of mathematical analysis and discover new horizons of knowledge!