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.
Leonīds Ostrovskis Leonīds Ostrovskis (Russian: Леонид Альфонсович Островский , Ukrainian: Леонід Альфонсович Островський , "Leonid Alfonsovich Ostrovskiy"; 17 January 1936 in Riga – 17 April 2001 in Kiev) was a Soviet Latvian football player and manager. He was Jewish.