Question: Did both Sergei Sobolev and Vladimir Berkovich work in the field of mathematics ?
Sentence (from "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.
Relevant evidence: Yes