Lazar Lyusternik and Israel Gelfand, have which mutual occupation?
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.
Abel Herzberg Abel Jacob Herzberg (17 September 1893 – 19 May 1989) was a Dutch Jewish lawyer and writer, whose parents were Russian Jews who had come to the Netherlands from Lithuania. Herzberg was trained as a lawyer and began a legal practice in Amsterdam, and became known as a legal scholar also. He was a Zionist from an early age, and around the time of the outbreak of World War II he attempted to emigrate with his family to Palestine. During the war he remained active in Jewish organizations until he was interned, with his wife, in Bergen-Belsen concentration camp, where his legal background and status as a legal scholar (which made him desirable to the Nazis in a possible exchange for Germans abroad) earned him a seat on a prisoners' court. After their captors moved them from Bergen-Belsen, he and his wife were later liberated by the Soviets and made it back to the Netherlands, where they were reunited also with their children. He continued his legal practice in Amsterdam, though he traveled to Palestine and was offered an administrative position in newly-founded Israel.