Stories about many

In the 70s of the XIX century, the German mathematician G. Cantor created a new area of ​​mathematics - the theory of endless sets. After a few decades, almost all mathematics was rebuilt on a theoretical and many. The concepts of the theory of sets reflect the most common properties of mathematical objects. Typically, the theory of sets is described in textbooks for universities. This book describes the basic concepts and results of the theory of sets in a popular form. The book is intended for high school students of secondary school, interested in mathematics, as well as for the wide circles of readers who want to find out what the theory of sets is. The previous edition of the book was published in 2013.
6th edition, stereotypical