Eugene Borisovich Dynkin (Russian: Евге́ний Бори́сович Ды́нкин ; 11 May 1924 – 14 November 2014) was a Soviet and American mathematician.
 He has made contributions to the fields of probability and algebra, especially semisimple Lie groups, Lie algebras, and Markov processes.
 The Dynkin diagram, the Dynkin system, and Dynkin's lemma are named after him.
In mathematics — specifically, in stochastic analysis — Dynkin's formula is a theorem giving the expected value of any suitably smooth statistic of an Itō diffusion at a stopping time.
 It may be seen as a stochastic generalization of the (second) fundamental theorem of calculus.
 It is named after the Russian mathematician Eugene Dynkin.
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).
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.
A Dynkin system, named after Eugene Dynkin, is a collection of subsets of another universal set formula_1 satisfying a set of axioms weaker than those of σ-algebra.
 Dynkin systems are sometimes referred to as λ-systems (Dynkin himself used this term) or d-system.
 These set families have applications in measure theory and probability.
Lieutenant-General Anatoly Ivanovic Kostenko (Belarusian: Анатоль Іванавіч Касценка; born on 27 January 1940) was the Minister of Defence of Belarus from 28 July 1994-6 June 1995.
 He was preceded by Paul Kozlowski and succeeded by Leonid Maltsev.
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 probability theory, the Doob–Dynkin lemma, named after Joseph L. Doob and Eugene Dynkin, characterizes the situation when one random variable is a function of another by the inclusion of the formula_1-algebras generated by the random variables.
 The usual statement of the lemma is formulated in terms of one random variable being measurable with respect to the formula_1-algebra generated by the other.
Eugene Demjanovich Maltsev (Russian: Евгений Демьянович Мальцев ; August 9, 1929, Ryazan Oblast, USSR — December 24, 2003, Saint Petersburg, Russia) was a Soviet Russian painter, People's Artist of the Russian Federation, a member of the Saint Petersburg Union of Artists (before 1992 — the Leningrad Union of the Soviet Artists), who lived and worked in Leningrad.
 In 1990-1997 Eugene Maltsev was a head of the Saint Petersburg Union of Artists, in 1989-1991 was elected a People's Deputies of the Soviet Union from the USSR Union of Artists.
 Maltsev regarded as one of representatives of the Leningrad school of painting, most famous for his portrait and historical paintings.
In the mathematical field of Lie theory, a Dynkin diagram, named for Eugene Dynkin, is a type of graph with some edges doubled or tripled (drawn as a double or triple line).
 The multiple edges are, within certain constraints, directed.

Question: What occupation did Eugene Dynkin and Anatoly Maltsev both have in common?
Answer: mathematician