The Equations of Mathematical Physics : Some Questions , associated with the Hamilton-Jacob equation and the wave equation" by Evgeny Vorobyov is a deep and fascinating study in the field of mathematical physics. which, Definitely , Attracts the attention of students, Post-graduate students and researchers , interested in the theoretical aspects of physics and mathematical analysis. Vorobyov, known for his work in mathematical physics, offers the reader a unique perspective on the complex equations that underlie many physical phenomena. In particular, the author focuses on the Hamilton-Jacobi equation and the wave equation, which are the cornerstones in the theory of dynamical systems and quantum mechanics. These equations not only describe the behavior of particles and waves, but also open the door to a deeper understanding of the nature of space and time. The book begins with the basics, gradually deepening into complex concepts and methods, making it suitable for both beginners and more experienced readers. Vorobyov uses clear and accessible language, which allows even those who are not experts in the field of mathematical physics to understand the basic ideas and principles. However, despite the availability of the presentation, the book does not lose in depth and scientific rigor, which makes it a valuable resource for professionals. The topics raised in the book cover a wide range of issues related to mathematical physics. The author discusses not only theoretical aspects, but also practical applications of equations, which makes the material especially relevant for students and researchers working in the field of physics, engineering and applied mathematics. Vorobyov emphasizes the importance of the Hamilton-Jacobi equations in the context of modern research, including quantum theory and relativity theory, which emphasizes their universality and significance. The book will be especially interesting for those who are fond of mathematics and physics, as well as for those who seek to deepen their knowledge in these areas. Students studying physics or mathematics at the bachelor's and master's level will find it useful materials for preparing for exams and writing term papers . Graduate students and young scientists will be able to use it as a reference for their research, enriching their knowledge of modern methods and approaches in mathematical physics. The style of the author, Yevgeny Vorobyov, is distinguished by clarity and logical presentation, which makes his works easy to perceive. He has already established himself as the author of several scientific publications that address various aspects of mathematical physics. His ability to explain complex topics in simple language while maintaining scientific rigor makes his books valuable to a wide audience. If you are looking for literature that will help you understand the intricacies of mathematical physics, or want to deepen your knowledge of the Hamilton-Jacoby wave equation, this book will be a real find for you. It will not only expand your horizons, but also inspire further research in this fascinating field of science. Do not miss the opportunity to get acquainted with the work of Vorobyov - this is not just a book, but a real key to understanding the complex processes taking place in our world.