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Ivan Georgievich Petrovsky (also Petrovskii), a Soviet mathematician in the field of partial differential equations. He greatly contributed to solution of Hilbert's 19th and 16th problems.116 views
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Sergey Leonidovich Sokolov (1911-2012) and his wife. Sergei Sokolov was a Soviet military commander, hero of the Soviet Union, and served as Minister of Defence of the Soviet Union from 22 December 1984 until 30 May 1987116 views
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