In order to discuss the historical heritage, the development of the ideas of outstanding Russian scientists Dmitry Fedorovich Egorov and Sergey Alekseevich Chaplygin and in honor of their 150th anniversary at the Lomonosov Moscow State University, on the basis of the Faculty of Mechanics and Mathematics, November 22, 2019 will be held a Solemn meeting dedicated to the 150th anniversary of the birth of D.F. Egorov and the 150th birthday of S.A. Chaplygin.