"Linear Operators and Approximation Theory" by P. P. Korovkina is a fascinating and deep immersion in the world of mathematical analysis and functional analysis, which will be a real discovery for students, graduate students and anyone interested in modern methods of solving mathematical problems. This work is not just a textbook, but a real treasure trove of knowledge, in which the author shares his many years of research and practical experience in the field of linear operators and approximation theory. Korovkin's focus is on linear operators, which play a key role in various areas of mathematics and its applications. The book covers a wide range of topics, ranging from the basics of linear algebra to more complex concepts such as spectral theory and functional spaces. The reader will be able to learn how linear operators are used to model real processes and systems, as well as how they help in solving differential equations and other mathematical problems. This book will be especially interesting for those who study mathematics at the undergraduate and graduate levels, as well as specialists working in the field of applied mathematics, physics and engineering .. If you are passionate about mathematical analysis, function theory, or just want to better understand how linear operators can be applied in various scientific disciplines, then Linear Operators and Approximation Theory will be an indispensable tool for you. Korovkin masterfully provides material, making it accessible and understandable, even for those who are just starting their way in the study of linear operators. It uses many examples and tasks that help to consolidate theoretical knowledge in practice. The author focuses on the importance of approximations in mathematics, explaining how they can be used to simplify complex problems and find solutions that may not be available using traditional methods. The topics raised in the book cover not only theoretical aspects, but also practical applications of linear operators in various fields of science and technology. Korovkin shows how theoretical concepts can be applied to real-world problems, making his work particularly valuable for students and researchers. Korovkin's style is distinguished by clarity and logical presentation, which allows readers to easily absorb material. His previous works, such as Fundamentals of Functional Analysis and Methods of Mathematical Physics, have also been praised for their accessibility and depth of presentation. In Linear Operators and Approximation Theory, the author continues this tradition, offering readers not only theoretical knowledge, but also practical skills that they can use in their professional activities. If you’re looking for a book that will help you better understand linear operators and their applications in approximation theory, “Linear Operators and Approximation Theory” by P. P. The cow is exactly what you need. This work will become your reliable companion in the world of mathematical analysis and will open new horizons in the study of this fascinating science. Do not miss the opportunity to enrich your knowledge and skills with this outstanding work!