Prof Sergei Lvovich Sobolev, FRSE was a Soviet mathematician working in mathematical analysis and partial differential equations.

The Lomonosov Gold Medal, named after Russian scientist and polymath Mikhail Lomonosov, is awarded each year since 1959 for outstanding achievements in the natural sciences and the humanities by the USSR Academy of Sciences and later the Russian Academy of Sciences (RAS). Since 1967, two medals are awarded annually: one to a Russian and one to a foreign scientist. It is the academy's highest accolade.