Differential and Integral Calculus of Functions of One and Many Variables . Differential Equations by B. In. Ciegelnik is not just a textbook, but a real find for students, teachers and anyone who seeks to understand the basics of mathematical analysis more deeply. In this edition, the author masterfully combines theory and practice, offering readers not only clear explanations, but also a variety of examples, tasks and exercises that will help consolidate the knowledge gained. The main purpose of the book is to acquaint the reader with the key concepts of differential and integral calculus, as well as with the basics of differential equations. In. In. Zegelnik, an experienced teacher and mathematician, shares his knowledge and experience, creating an accessible and understandable text that will be useful to both beginners and those who already have some knowledge in this field. The book covers a wide range of topics, from the simplest concepts of derivative and integral to more complex aspects such as multidimensional functions and their applications. This book will be especially interesting for students of technical and natural sciences, as well as for anyone who is ready to plunge into the world of mathematical analysis. If you are looking for a high-quality mathematics textbook that will help you prepare for exams or simply expand your knowledge, then this publication will become your reliable assistant. In addition, it will be useful for teachers who can use it as a methodological material for their classes. The topics raised in the book cover not only theoretical aspects, but also practical applications of mathematical analysis in various fields of science and technology. In. In. Tsegelnik emphasizes the importance of understanding the mathematical models that underlie many phenomena in physics, engineering, and economics. The reader will be able to see how abstract mathematical concepts find their application in real life, which makes the study of calculus not only useful, but also fascinating. The author’s style is distinguished by clarity and logical presentation . Tsegelnik is able to easily and easily explain even the most complex topics, which makes his manual ideal for self-study. In addition, the book presents a variety of tasks that will help the reader to test their knowledge and skills, as well as develop analytical thinking. Each chapter ends with control questions and tasks, which allows you to consolidate the studied material and prepare for practical exercises. If you are looking for additional books on mathematics that can complement your understanding of differential and integral calculus, pay attention to the work of authors such as G. M. Fichtenholz or E. M. Gelfand . These authors also offer in-depth and informative tutorials that will help you in learning mathematics. Book B. In. Differential and Integral Calculus of Functions of One and Many Variables . Differential Equations is not just a textbook, but a whole world of mathematical knowledge waiting to be discovered. Immerse yourself in the study of calculus, and you will see how this science can change your perception of the world around you.