The book “Functions of several variables”, prepared by the team of authors, is an indispensable guide to the fascinating and complex world of multidimensional mathematics. This tutorial is intended for those who want not just to memorize formulas and theorems, but to understand the underlying principles underlying the analysis of the functions of several variables and learn how to apply them to real-world problems. In today's world, where technology and science are increasingly based on multidimensional models, this book is becoming a real key to understanding complex systems, be it physics, engineering, economics or computer science. "Multivariable Functions" is not just a theoretical course, but a real adventure in the space of infinite possibilities. The authors, who have rich pedagogical experience and deep knowledge, masterfully reveal such topics as differentiation and integration in multidimensional spaces, gradients, divergences, rotors, and Stokes and Gauss theorems .. Particular attention is paid to the visualization of complex concepts, which helps the reader not only to understand, but also to feel the structure of multidimensional functions, which is especially important for those who are faced with this for the first time. This book is ideal for senior students, graduate students and faculty, as well as engineers and scientists working in areas where a deep understanding of multidimensional processes is required. It will be interesting for those who are looking not only for theoretical foundations, but also practical skills in solving problems related to modeling and analyzing multidimensional data. For those interested in mathematics as an art and not just as a science, Multiple Variables will open new horizons and inspire further research. What makes this book especially valuable is its style of presentation. The team of authors created not just a textbook, but a lively and dynamic manual, saturated with examples, illustrations and tasks that stimulate analytical thinking. Each chapter is designed so that the reader can gradually immerse himself in the material, mastering new concepts on the basis of what has already been studied. As a result, even the most complex topics become accessible and understandable, and learning turns into an exciting journey through the world of multidimensional functions. Turning to the style of the authors, we can note their ability to combine the rigor of the scientific approach with a lively and understandable language, which makes the book attractive to a wide range of readers. Their other well-known works on mathematical analysis and differential equations confirm their reputation as talented educators and researchers. It is thanks to this approach that “Multivariate Functions” is deservedly considered one of the best tutorials on this topic. If you are looking for a book that will help you not only to master the theoretical foundations, but also learn how to apply them in practice, understand how to analyze multidimensional systems and visualize complex functions, this book will become your reliable companion. It is suitable for students, teachers, engineers and researchers seeking to expand their knowledge and deepen their understanding of multidimensional mathematics. In today's world, where data and models are becoming increasingly multidimensional, "Multivariable Functions" are your key to new discoveries and professional growth. So, if you want to immerse yourself in the exciting world of multidimensional functions, understand their structure and learn how to apply the acquired knowledge in various fields of science and technology, the book “Functions of several variables” from the team of authors will become an indispensable assistant for you. This is not just a textbook, but a real guide to the world of complex and beautiful mathematical concepts that will inspire you to new discoveries and expand the horizons of your thinking.