The book "Lectures on the theory of functions of a complex variable", written by the author's team consisting of Sidorov Yu. In. , Fedoryuk M. In. and Shabunin M. and . , is a unique teaching aid that will become an indispensable assistant for students, graduate students and anyone interested in mathematics at a deeper level. This edition covers the main aspects of the theory of functions of a complex variable, providing readers with not only theoretical knowledge but also the practical skills needed to solve complex problems. The book deals in detail with key topics such as analytical functions, Cauchy integrals,. theorem Residue, as well as applications of integrated analysis in various fields of science and technology. The authors strive to make the material accessible and understandable, which is especially important for those who are just beginning to get acquainted with this complex but fascinating topic. Each lecture is structured in such a way that the reader can easily absorb information, moving from simple concepts to more complex ones, which makes the learning process not only effective, but also interesting. Who can like this edition? First of all, the book will be useful to students of mathematical, physical, mathematical and engineering specialties, as well as graduate students engaged in research activities in the field of mathematics and its applications . However, interest in it can be shown by wider circles of readers, including teachers, researchers and anyone who wants to deepen their knowledge in the field of complex analysis. If you are looking for a quality source of information on this topic that will help you understand the intricacies and nuances, then “Lectures on the theory of functions of a complex variable” is exactly what you need. One of the main topics raised in the book is the relationship of the theory of functions of a complex variable with other areas of mathematics and physics. The authors show how complex analysis can be applied to solve real problems, which makes the material especially relevant and practical. For example, the book discusses applications of complex analysis in the theory of electrical circuits, quantum mechanics, and other fields, which can be quite useful for students and professionals. The style of the authors is distinguished by clarity and logical presentation, which allows the reader to easily follow the course of thought and absorb complex ideas. Sidorov Yu . In. , Fedoryuk M. In. and Shabunin M. and . are known for their teaching aids and scientific works, which have been recognized both in Russia and abroad. Their experience and deep knowledge in the field of mathematics allow us to create material that not only meets modern requirements, but also inspires further study. If you are looking for books on the theory of functions of a complex variable, then this publication will be a real find for you. It will not only expand your knowledge, but also allow you to look at mathematics from a new perspective. Readers interested in works such as "Integrated Analysis" L. P. Kudryavtseva or "Functions of a Complex Variable" A. and . Bendixon, will find in this book a lot of useful and interesting. In conclusion, "Lectures on the theory of functions of a complex variable" is not just a textbook, but a real encyclopedia of knowledge that will help you immerse yourself in the world of complex analysis and open up new horizons in mathematics. Do not miss the opportunity to enrich your knowledge and skills by reading this outstanding work!