The book "Mixed problem for partial differential equations with quasi-homogeneous older part" by the authors Volevich L. R. Gindykina S . G. It is a unique study that immerses the reader in the world of mathematical analysis and the theory of differential equations. This work will be especially interesting to those who seek to deepen their knowledge in the field of mathematical physics and applied mathematics, as well as to those who are engaged in scientific research or teaching in these areas. The authors, with rich experience in mathematics, offer the reader a detailed consideration of mixed problems that are important in both theory and practice. The book covers a wide range of topics related to partial differential equations, including their application in various fields of science and technology. Volevich and Gindikin not only outline theoretical aspects, but also offer practical examples, which makes the material accessible and understandable. The book will be especially useful for senior students, graduate students and teachers working in the field of mathematical sciences. It can also attract the attention of researchers involved in the modeling of physical processes, since the tasks considered in it have wide applications in areas such as mechanics, thermodynamics and electrodynamics. Readers interested in mathematical modeling will be able to find in the book many useful ideas and methods that can be applied in their research. The topics raised in the book concern not only theoretical issues, but also practical aspects of solving mixed problems. The authors analyze quasi-homogeneous equations in detail, allowing the reader to better understand how these equations can be used to describe real-world processes. The book also touches on the existence and uniqueness of solutions, which is a key point in the theory of differential equations. The style of the authors is distinguished by clarity and logical presentation, which allows the reader to easily follow the course of thought. Volevich and Gindikin use many illustrations and examples, which makes complex concepts more accessible. Their approach to explaining the material contributes to a deep understanding of the topic and allows the reader to independently solve similar tasks. If you are looking for literature that will help you understand the complex aspects of differential equations, then this book will be an excellent choice. It will not only expand your knowledge, but also inspire new research and discoveries in the field of mathematics. In addition, if you are interested in such works as “Differential equations in partial derivatives” or “Methods of mathematical physics”, “Mixed problem for differential equations in partial derivatives with a quasi-homogeneous older part” will be a logical continuation of your reading. In conclusion, it is worth noting that the book of Volevich and Hindikin is not just a textbook, but a real find for anyone who wants to delve deeper into the world of mathematical analysis and differential equations. It opens up new horizons and offers the reader a unique opportunity to master complex topics with ease and pleasure.