Did both Sergei Sobolev and Vladimir Berkovich work in the field of mathematics ?
Sergei Sobolev Sergei Lvovich Sobolev (Russian: Серге́й Льво́вич Со́болев ; 6 October 1908 – 3 January 1989) was a Soviet mathematician working in mathematical analysis and partial differential equations. He was born in St. Petersburg, and died in Moscow.
Vladimir Baryshevsky Vladimir Grigoryevich Baryshevsky (Russian: Владимир Григорьевич Барышевский ; Belarusian: Уладзімір Рыгоравіч Барышэўскі ; born 1 July 1940) is a Soviet and Belarusian physicist, Honored Scientist of the Republic of Belarus, Winner of the State Prize of the Republic of Belarus.