Andrei Andreevich Bolibrukh (russian: Андрей Андреевич Болибрух) (30 January 1950 – 11 November 2003) was a

Soviet The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nation ...

and

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

. He was known for his work on

ordinary differential equation In mathematics, an ordinary differential equation (ODE) is a differential equation whose unknown(s) consists of one (or more) function(s) of one variable and involves the derivatives of those functions. The term ''ordinary'' is used in contrast ...

s especially

Hilbert's twenty-first problem The twenty-first problem of the 23 Hilbert problems, from the celebrated list put forth in 1900 by David Hilbert, concerns the existence of a certain class of linear differential equations with specified singular points and monodromic group. S ...

( Riemann–Hilbert problem). Bolibrukh was the author of about a hundred research articles on theory of ordinary differential equations including Riemann–Hilbert problem and Fuchsian system.

Work

Bolibrukh was born on 30 January 1950 in

Moscow Moscow ( , US chiefly ; rus, links=no, Москва, r=Moskva, p=mɐskˈva, a=Москва.ogg) is the capital and largest city of Russia. The city stands on the Moskva River in Central Russia, with a population estimated at 13.0 millio ...

and studied at the

45th Physics-Mathematics School Dmitry Konstantinovich Faddeev Academic Gymnasium at Saint Petersburg State University (russian: Академическая гимназия имени Д. К. Фаддеева Санкт-Петербургского государственного ...

Saint Petersburg Saint Petersburg ( rus, links=no, Санкт-Петербург, a=Ru-Sankt Peterburg Leningrad Petrograd Piter.ogg, r=Sankt-Peterburg, p=ˈsankt pʲɪtʲɪrˈburk), formerly known as Petrograd (1914–1924) and later Leningrad (1924–1991), i ...

. After receiving his mathematical education at the

Lomonosov Moscow State University M. V. Lomonosov Moscow State University (MSU; russian: Московский государственный университет имени М. В. Ломоносова) is a public research university in Moscow, Russia and the most prestigious ...

, with Mikhail Mikhailovich Postnikov and Alexey Chernavskii as thesis advisers, he started working on the proof of the existence of linear differential equations having a prescribed monodromic group. He applied modern methods of complex analytic geometry to classical problems about

s and was an expert on

. In 1989, Bolibrukh produced his famous counterexamples which invalidated the

Josip Plemelj Josip Plemelj (December 11, 1873 – May 22, 1967) was a Slovene mathematician, whose main contributions were to the theory of analytic functions and the application of integral equations to potential theory. He was the first chancellor of t ...

's 1908 solution of Hilbert's twenty-first problem. Bolibrukh dedicated much of his efforts to the Riemann-Hilbert problem in order to find full necessary and sufficient conditions for given monodromy data to be those of a Fuchsian system. During his short career he served as Deputy Director of the Steklov Institute of Mathematics and professor at the

Moscow Institute of Physics and Technology Moscow Institute of Physics and Technology (MIPT; russian: Московский Физико-Технический институт, also known as PhysTech), is a public research university located in Moscow Oblast, Russia. It prepares speciali ...

Honours and awards

In 1994 Bolibrukh was elected to the

Russian Academy of Sciences The Russian Academy of Sciences (RAS; russian: Росси́йская акаде́мия нау́к (РАН) ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across ...

. He was an Invited Speaker at the ICM in Zürich in 1994. He was awarded the Lyapunov Prize from the Academy of Sciences, Russia in 1995. In 2001 Bolibrukh received the State Prize of the Russian Federation.

References

External links

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Andrei Bolibrukh
Web page at the Russian Academy of Sciences. {{DEFAULTSORT:Bolibrukh, Andrei Andreevich 1950 births 2003 deaths 20th-century Russian mathematicians Mathematical analysts Full Members of the Russian Academy of Sciences State Prize of the Russian Federation laureates Moscow State University alumni Academic staff of the Moscow Institute of Physics and Technology Burials in Troyekurovskoye Cemetery