Omar Hayam. Mathematician, astronomer, philosopher, poet. Rosenfeld B.A., Yushkevich A.P.

The attention of readers is offered a book written by two famous Soviet historians and dedicated to Omar Hayama - the outstanding Persian mathematics, astronomer, philosopher and poet. The young years of the scientist’s life, the years of his training and wanderings in the countries of the medieval East are described. It is described about his works and achievements in the field of algebra, geometry and theory of numbers, including the first steps made by him and became the prerequisites for discovery in the 19th century by Neyvlida geometry; On the leadership of the observatory in Isfahan and the development of a solar calendar. Separate chapters are devoted to his philosophical treatises and poetic creativity.