A lover of fine literature, Filaret Filaretovich Filaretov, or Filo for short, and Matvey Matveevich Matveev, or Mate for short, who recognizes only the beauty of mathematics, go on a journey through past eras in search of autographs of great writers and mathematicians. Imagine their surprise when it turns out that they are looking for the same people! On the pages of this amazing book you will meet Omar Khayyam, Blaise Pascal, Eratosthenes, Fibonacci, Pythagoras and many other great people who may appear in a new, unfamiliar capacity. It is important that the book is written in simple, understandable language and does not require special knowledge in the field of mathematics.