In mathematics, Hahn series (sometimes also known as Hahn–Mal'cev–Neumann series) are a type of formal infinite series.
 They are a generalization of Puiseux series (themselves a generalization of formal power series) and were first introduced by Hans Hahn in 1907 (and then further generalized by Anatoly Maltsev and Bernhard Neumann to a non-commutative setting).
 They allow for arbitrary exponents of the indeterminate so long as the set supporting them forms a well-ordered subset of the value group (typically formula_1 or formula_2).
 Hahn series were first introduced, as groups, in the course of the proof of the Hahn embedding theorem and then studied by him as fields in his approach to Hilbert's seventeenth problem.
The Independent University of Moscow (IUM) (Russian: Независимый Московский Университет (НМУ) ) is a small educational organisation with rather informal status located in Moscow, Russia.
 It was founded in 1991 by a group of prominent Russian mathematicians that included Vladimir Arnold (chairman) and Sergei Novikov.
 The IUM consists of the departments of mathematics and theoretical physics and the post-graduate school.
 Anyone can attend lectures and seminars and become a student after passing three exams.
 The IUM is the only non-state college for the preparation of professional mathematicians in Russia .
 An IUM diploma is recognized by such authoritative mathematical institutions as the Steklov Institute of Mathematics, Harvard University and the Weizmann Institute.
Leon Isserlis (1881–1966) was a Russian-born British statistician known for his work on the exact distribution of sample moments, including Isserlis’ theorem.
 He also brought to the attention of British statisticians the work of Russian mathematicians and statisticians, including Chebyshev and Chuprov.
Gradshteyn and Ryzhik (GR) is the informal name of a comprehensive table of integrals originally compiled by the Russian mathematicians I. S. Gradshteyn and I. M. Ryzhik.
 Its full title today is Table of Integrals, Series, and Products.
The Ministry of Defence of the Republic of Belarus (Russian: Министерство обороны Республики Беларусь, Belarusian: Мiнiстэрства абароны Рэспублікі Беларусь) is the government organisation that is charged with the duties of raising and maintaining the Armed Forces of Belarus.
 The formation of the ministry began in 1992, after the events of 1991 in which the Soviet Union had effectively dissolved.
 Seven officers have served as Minister of Defence of Belarus: Petr Chaus, Pavel Kozlovskii, Anatoly Kostenko, Leonid Maltsev (1995–96), Colonel General Alexander Chumakov, a Russian officer, (1996–2001), Yuriy Zhadobin (2009–2014), and Andrei Ravkov (2014-present).
Anatoly Ivanovich Maltsev (also: Malcev, Mal'cev; Russian: Анато́лий Ива́нович Ма́льцев; 27 November N.S./14 November O.S. 1909, Moscow Governorate – 7 June 1967, Novosibirsk) was born in Misheronsky, near Moscow, and died in Novosibirsk, USSR.
 He was a mathematician noted for his work on the decidability of various algebraic groups. Malcev algebras (generalisations of Lie algebras) are named after him.
In mathematics, the Markov brothers' inequality is an inequality proved in the 1890s by brothers Andrey Markov and Vladimir Markov, two Russian mathematicians.
 This inequality bounds the maximum of the derivatives of a polynomial on an interval in terms of the maximum of the polynomial.
 For "k" = 1 it was proved by Andrey Markov, and for "k" = 2,3... by his brother Vladimir Markov.
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.
Sparse grids are numerical techniques to represent, integrate or interpolate high dimensional functions.
 They were originally developed by the Russian mathematician Sergey A. Smolyak, a student of Lazar Lyusternik, and are based on a sparse tensor product construction.
 Computer algorithms for efficient implementations of such grids were later developed by Michael Griebel and Christoph Zenger.
This list of Russian mathematicians includes the famous mathematicians from the Russian Empire, the Soviet Union and the Russian Federation.

Question: Which of these Russian mathematicians died later, Anatoly Maltsev or Lazar Lyusternik?
Answer: Lazar Aronovich Lyusternik