Proceedings of the Seminar on Functional Analysis . Issue 2" edited by Mikhail Alexandrovich Krasnoselsky is a unique publication that will become a real find for everyone who is interested in modern areas in mathematics, especially in the field of functional analysis. This is not just a collection of articles, but a real treasure trove of knowledge, which contains the works of leading scientists and practitioners dealing with topical problems of functional analysis. Functional analysis is one of the most dynamically developing areas of mathematics, which finds application in a variety of fields: from quantum mechanics to control theory. This issue presents research that covers a wide range of topics, including operator theory, spectral theory, as well as various aspects of the application of functional analysis in other fields of science. The reader will be able to immerse himself in the world of mathematical concepts that are not only interesting from a theoretical point of view, but also have practical significance. The book will be especially useful for students, graduate students and teachers of mathematical faculties, as well as for all those engaged in scientific research in the field of mathematics and related disciplines .. If you are looking for an in-depth understanding of functional analysis or want to expand your knowledge of its application, this work will become an indispensable source of information for you. It can also attract the attention of researchers working in the field of applied mathematics, physics and engineering, where methods of functional analysis play a key role. Topics raised in the book range from classic questions of functional analysis to contemporary advances and discoveries. Each article in the collection is written taking into account the latest trends and trends in science, which makes this work relevant and in demand. The authors of the articles are recognized experts in their fields, which adds additional value to the content of the book. Readers will be able to see how theoretical concepts are applied in practice, which makes the material especially lively and interesting. The style of Mikhail Alexandrovich Krasnoselsky, as an editor, is distinguished by the clarity and accessibility of the presentation, which allows even complex mathematical ideas to be presented in an understandable form. He is known for his work in functional analysis and operator theory, and his contributions to this book highlight his status as one of the leading experts in the field. Krasnoselsky is also the author of other significant works, such as