The book Discrete Mathematics by Igor Leonidovich Eros is a fascinating and deep immersion in the world of mathematical structures that underlie many modern technologies and scientific research. This work will become an indispensable assistant for students, graduate students and anyone interested in mathematics and its applications in computer science, programming and other fields. In Discrete Mathematics, Erosh explores key topics such as combinatorics, graph theory, logic, algorithms, and a host of other concepts that form the basis for understanding more complex mathematical concepts. The author not only explains the theoretical aspects, but also demonstrates how these ideas are applied in practice. Each chapter of the book is filled with examples, tasks and illustrations, which makes the material accessible and understandable even for those who are just starting their way in the study of mathematics. This book will be interesting not only for students of mathematical and technical specialties, but also for those who want to expand their knowledge in the field of programming and computer science. If you are passionate about solving logical problems, developing algorithms, or just want to better understand how the digital world around us works, “Discrete Mathematics” will be a real find for you. It is suitable for both students preparing for the Olympics and for students studying more complex disciplines. The topics raised in the book cover a wide range of issues such as mathematical logic, set theory, combinatorial structures, and algorithmic complexity. Each of these topics is not only interesting in itself, but is also of great importance for practical application in various fields, including computer science, cryptography and even game theory. Erosh focuses on how discrete mathematics helps solve real-world problems, which makes the book especially relevant in the face of rapid technology development. The author's style is clear and accessible. Igor Leonidovich Erosh is an experienced teacher, and his ability to explain complex things in simple language makes reading a book fascinating and informative. He is also known for his other works, which cover various aspects of mathematics and computer science, and each of them is distinguished by a deep analysis and practical approach. If you are looking for a book that will not only help you master the basics of discrete mathematics, but also inspire further research and practical experiments, Igor Erosh’s Discrete Mathematics is exactly what you need. It will become your reliable companion in the world of numbers and logical structures, opening up new horizons and opportunities for you. Don’t miss the chance to immerse yourself in the exciting world of discrete mathematics with this book. It will be your faithful assistant in study and career, and will give a lot of exciting moments related to solving mathematical problems and mastering new knowledge.