Were Pavel Urysohn and Leonid Levin known for the same type of work?
Leonid Levin Leonid Anatolievich Levin ( ; Russian: Леони́д Анато́льевич Ле́вин ; Ukrainian: Леоні́д Анато́лійович Ле́він ; born November 2, 1948) is a Soviet-American computer scientist.
Boris Parygin Boris Dmitrievitch Parygin (Russian: Борис Дмитриевич Парыгин) (19 June 1930 – 9 April 2012) was a Soviet and Russian philosopher, sociologist and one of the founders of social psychology and member of a wide range of international academies. Parygin was a specialist in a sphere of philosophical and psychological problems of social psychology – its history, methodology, theory and praxeology.