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.
Stepan Gedeonov Stepan Alexandrovich Gedeonov (Russian: Степан Александрович Гедеонов , 13 June 1816, Saint Petersburg, Imperial Russia—17 September 1878, Saint Petersburg, Imperial Russia) was a Russian art scholar, playwright, critic and historian, the director of the Hermitage Museum (in 1863-1878) and Russian Imperial Theatres, in 1867—1875.