Semyon Aranovich Gershgorin and Vladimir Berkovich, have which occupation?
Semyon Aranovich Gershgorin Semyon Aronovich Gershgorin (August 24, 1901 – May 30, 1933) was a Soviet (born in Pruzhany, Belarus, Russian Empire) mathematician. He began as a student at the Petrograd Technological Institute in 1923, became a Professor in 1930, and was given an appointment at the Leningrad Mechanical Engineering Institute in the same year. His contributions include the Gershgorin circle theorem.
Alexander Kasyanov Aleksandr Aleksandrovich Kasyanov (Александр Александрович Касьянов; 17 August 1891 - Gorki 13 February 1982) was a Soviet Russian composer, conductor, pianist and professor. He received the Order of Lenin in 1967, Order of the October Revolution 1981, and People's Artist of the USSR 1971.