The book "Doubleness in Linear Programming and the Theory of Matrix Games" by N. C. Vasilyeva is a fascinating and in-depth study that opens up the world of mathematical modeling and optimization to readers. In his work, the author not only introduces the reader to the basics of linear programming, but also immerses him in the intricacies of matrix game theory, demonstrating how the two areas are interrelated and complement each other. The main idea of the book is to study duality - a concept that allows you to solve complex optimization problems using simpler and more understandable models. Vasilyev masterfully explains how ambivalent problems can be used to find optimal solutions in various fields, from economics to engineering. The book contains many examples and tasks that will help the reader not only to understand the theoretical foundations, but also to apply them in practice. This work will be of particular interest to undergraduate and graduate students studying mathematics, economics, management, and related disciplines. The book will also be useful to practitioners working in the field of optimization, data analysis and game theory. If you are looking for literature that will help you deepen your knowledge of linear programming and teach you how to apply this knowledge to real-world problems, then “Doubleness in Linear Programming and Matrix Game Theory” will be an excellent choice. The topics raised in the book are diverse and relevant. The author discusses not only theoretical aspects, but also practical applications of duality in various fields. Readers will be able to learn about how linear programming can be used to solve resource allocation problems, optimize production processes, and even in strategic planning. Matrix game theory, in turn, opens the door to an understanding of competitive strategies and player interaction under uncertainty. Style N. C. Vassilyeva is distinguished by clarity and accessibility. He skillfully combines theoretical calculations with practical examples, which makes the material easy to perceive. The author also does not forget about the importance of data visualization and includes in the book many graphs and tables that help to better understand complex concepts. This makes the book not only useful, but also fascinating to read. The book "Doubleness in Linear Programming and Matrix Game Theory" is an important contribution to the literature on mathematics and economics. It can become a reference book for students and teachers, as well as for anyone interested in optimization and game theory. If you are looking for something similar to the work of authors such as L. In. Kulikov or A. N. This book will be a great addition to your library. In conclusion, it is worth noting that “Doubleness in linear programming and matrix game theory” is not just a textbook, but a real find for everyone who seeks to understand and master complex mathematical concepts. It inspires further research and opens new horizons in the world of science and practice. Do not miss the opportunity to immerse yourself in this fascinating world of optimization and strategic thinking with H. C. Vasilyev!