The "Functional Analysis" . Basic Concepts" edited by B. M. Pisareva is an important and relevant publication that will become an indispensable assistant for students, graduate students and teachers studying mathematics and its applications. This book brings together the basic concepts and ideas of functional analysis presented in an accessible and understandable form, making it an ideal choice for those who want to deepen their knowledge in this area. Functional analysis is a branch of mathematics that studies the functionals and spaces of functions, and its principles find application in various fields of science and technology, including physics, economics, and computer science. In the book, Pisarev and his colleagues will be able to get acquainted with basic concepts, such as Banach and Hilbert spaces, linear operators, spectral theory and much more. These topics are revealed with the help of clear definitions, theorems and examples, which allows the reader not only to assimilate the material, but also to see its practical application. Who can like this book? First of all, it will be of interest to students of mathematical and physical faculties, as well as graduate students who are engaged in research in the field of functional analysis . Teachers and researchers will also find it useful materials for the preparation of lectures and seminars . In addition, the book will be useful to those working in related fields, such as applied mathematics, statistics, and even computer science, since functional analysis is the basis for many modern technologies. One of the key topics raised in the book is the connection between theory and practice. The authors aim to show how abstract mathematical concepts can be used to solve real-world problems. This makes the book not only a theoretical manual, but also a practical guide, which is especially important for students and professionals seeking to put their knowledge into practice. The style of presentation of the material in the book is clear and logical, which allows the reader to easily follow the thoughts of the authors. Each section is structured to gradually introduce the reader to complex topics, starting with the basics and gradually moving to more complex concepts. This makes the book suitable for both beginners and those who already have some experience in functional analysis and want to systematize their knowledge. The "Functional Analysis" . Basic Concepts" is not just a textbook, but a whole encyclopedia of knowledge that covers a wide range of topics and issues. It will become a reliable companion in the world of mathematics, helping readers not only to understand the theory, but also to develop the critical thinking and analytical skills necessary for successful work in a scientific and professional environment. If you are looking for something similar, pay attention to books such as