Question: Who was a Soviet mathematician active in number theory, probability theory and mathematical statistics, Boris Galerkin or Yuri Linnik ?
Context: Valery Ivanovich Glivenko (, Russian: Вале́рий Ива́нович Гливе́нко ; 2 January 1897 (Gregorian calendar) / 21 December 1896 (Julian calendar) in Kiev – 15 February 1940 in Moscow) was a Ukrainian Soviet mathematician.  He worked in foundations of mathematics, real analysis, probability theory, and mathematical statistics.  He taught at Moscow Industrial Pedagogical Institute until his death at age 43.  Most of Glivenko's work was published in French. Boris Grigoryevich Galerkin (Russian: Бори́с Григо́рьевич Галёркин , surname more accurately romanized as Galyorkin; 4 March [O.S. 20 February] 1871  – 12 July 1945), born in Polotsk, Vitebsk Governorate, Russian Empire, was a Jewish Soviet mathematician and an engineer. Wilfrid S. Kendall is professor of statistics at University of Warwick.  He earned a DPhil in probability theory from the University of Oxford in 1979, authored or edited 5 books, published around 100 scientific articles in theoretical and applied probability and is currently the president of the Bernoulli Society for Mathematical Statistics and Probability (2013-2015).  He is founding co-director of the UK Academy for PhD Training in Statistics (established in 2007), which each year provides training for around 90 first-year Statistics PhD students from UK and Republic of Ireland. Radha Govind Laha (1 October 1930 – 14 July 1999) was a probabilist, statistician, and mathematician, known for his work in probability theory, characteristic functions, and characterisation of distributions.  He was born in Calcutta, India and he was a student of C. R. Rao at Calcutta University, where in 1957 he earned a doctorate in analytical probability theory from the prestigious Indian Statistical Institute.  His dissertation was entitled "Some Characterization Problems in Probability Theory and Mathematical Statistics". Probability and Statistics or also called Statistics and Probability are two related but separate academic disciplines. Statistical analysis often uses probability distributions, and the two topics are often studied together.  However, probability theory contains much that is mostly of mathematical interest and not directly relevant to statistics.  Moreover, many topics in statistics are independent of probability theory. Sourav Chatterjee (born November 1979) is a mathematician, specializing in mathematical statistics and probability theory.  Chatterjee is credited with work on Stein's method on spin glasses and also the Universality of Lindeberg principle.  For these achievements, he was awarded a Sloan Fellowship in 2007 from the Alfred P. Sloan Foundation and the Tweedie New Researcher Award in 2008 from the Institute of Mathematical Statistics. Mathematical statistics is the application of mathematics to statistics, which was originally conceived as the science of the state — the collection and analysis of facts about a country: its economy, land, military, population, and so on.  Mathematical techniques which are used for this include mathematical analysis, linear algebra, stochastic analysis, differential equations, and measure-theoretic probability theory. The Electronic Journal of Probability is a peer-reviewed open access scientific journal published by the Institute of Mathematical Statistics and the Bernoulli Society.  It covers all aspects of probability theory and the editor-in-chief is Brian Rider (Temple University). " Electronic Communications in Probability" is a sister journal that publishes short papers.  Both journals share the same editorial board, but with different editors-in-chief.  According to the "Journal Citation Reports", the "Electronic Journal of Probability" has a 2016 impact factor of 0.904. Yuri Vladimirovich Linnik (Russian: Ю́рий Влади́мирович Ли́нник ; January 8, 1915 – June 30, 1972) was a Soviet mathematician active in number theory, probability theory and mathematical statistics. Mark Semenovich Pinsker (Russian: Марк Семено́вич Пи́нскер ; April 24, 1925 – December 23, 2003) or Mark Shlemovich Pinsker (Russian: Марк Шлемо́вич Пи́нскер ) was a noted Russian mathematician in the fields of information theory, probability theory, coding theory, ergodic theory, mathematical statistics, and communication networks.
Answer: Yuri Vladimirovich Linnik