Were Lazar Lyusternik and Alexander Ivanovich Mikhailov both Soviets?
Lazar Lyusternik Lazar Aronovich Lyusternik (also Lusternik, Lusternick, Ljusternik; Ла́зарь Аро́нович Люсте́рник ; 31 December 1899, Zduńska Wola, Congress Poland, Russian Empire (present-day Republic of Poland) – 23 July 1981, Moscow, Russia, Soviet Union) was a Soviet mathematician.
Alexander Vertinsky Alexander Nikolayevich Vertinsky (Russian: Алекса́ндр Никола́евич Верти́нский , 21 March 1889 in Kiev — 21 May 1957 in Leningrad, Polish: "Aleksander Wertyński" ) was a Russian and Soviet artist, poet, singer, composer, cabaret artist and actor who exerted seminal influence on the Russian tradition of artistic singing.