Сегодня родился Виноградов Иван Матвеевич
On September 14, 1891 Vinogradov Ivan Matveevich was born. This is a Soviet mathematician, a academician of Academy of Sciences of the USSR, a teacher, a professor, a director. Scientific works of Vinogradov are mainly devoted to the analytical theory of numbers. His main achievement was a creation of a method of the trigonometrical sums that is one of the strongest and powerful methods in analytical theory now. By means of this method he solved a number of problems which seemed inaccessible to mathematics of the beginning of the XX century.