Anatoly Karatsuba and Vladimir Levenshtein, are of which nationality?
Anatoly Karatsuba Anatoly Alexeevitch Karatsuba (Russian: Анато́лий Алексе́евич Карацу́ба ; Grozny, Soviet Union, January 31, 1937 – Moscow, Russia, September 28, 2008) was a Russian mathematician working in the field of analytic number theory, "p"-adic numbers and Dirichlet series.
Igor Nikolayev Igor Yuryevich Nikolayev (Russian: И́горь Ю́рьевич Никола́ев ; born 17 January 1960) is a Russian composer, singer and song-writer.