The Differential Equations . Summary of lectures” is a unique educational material that will become an indispensable assistant for students, graduate students and anyone interested in mathematics and its applications. This lecture-based summary covers the main topics and methods involved in differential equations and offers the reader an in-depth understanding of this important area of mathematics. In the world of science and technology, differential equations play a key role. They describe a variety of processes, from the movement of planets to fluctuations in electrical circuits. The book offers readers the opportunity to immerse themselves in this fascinating field by exploring both theoretical aspects and practical applications. Unlike many textbooks, this summary focuses on logic and intuition, which makes it easier to learn complex concepts and methods. Who will be interested in this book? First of all, it is addressed to students of mathematical and engineering specialties, as well as to those who are preparing for exams or want to deepen their knowledge in the field of differential equations . However, it is not only a teaching tool for students it will also be useful for teachers, researchers and anyone working in the field of applied mathematics, physics or engineering. If you are interested in mathematical models, data analysis or management theory, this summary will become a real storehouse of knowledge for you. The topics covered in the book cover a wide range of issues: from the simplest ordinary differential equations to more complex systems and partial differential equations. The reader will get acquainted with the methods of solution, such as the method of separating variables, the method of integrating the multiplier and many others. The book also touches on important aspects, such as the sustainability of decisions and qualitative analysis, which makes it especially valuable for those who want to not only solve equations, but also understand their behavior. The style of presentation of the material in the book is distinguished by clarity and accessibility. The author (or authors) seeks to make complex mathematical concepts understandable even for those who are just beginning their journey in the study of differential equations. Each topic is accompanied by examples and tasks, which allows the reader to consolidate the knowledge gained in practice. This approach makes the book not only a textbook, but also an interesting reader for mathematics lovers. If you are looking for literature on mathematics that will help you understand differential equations and their applications, "Differential Equations. Summary of lectures" - this is exactly what you need. This book will be your reliable companion in the world of mathematical research and will open up new horizons of understanding for you. Do not miss the opportunity to enrich your knowledge and skills in the field of mathematics. Read "Differential Equations. Summary of lectures" and immerse yourself in a fascinating world where mathematics meets real problems and problems. This book is your key to understanding the complex processes occurring in nature and technology, and the opportunity to become a master in solving differential equations.