Vladimir Ivanovich Smirnov (russian: Влади́мир Ива́нович Смирно́в) (10 June 1887 – 11 February 1974) was a

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, mathematical structure, structure, space, Mathematica ...

who made significant contributions in both pure and

applied mathematics Applied mathematics is the application of mathematical methods by different fields such as physics, engineering, medicine, biology, finance, business, computer science, and industry. Thus, applied mathematics is a combination of mathemat ...

, and also in the history of mathematics. Smirnov worked on diverse areas of mathematics, such as

complex function Complex analysis, traditionally known as the theory of functions of a complex variable, is the branch of mathematical analysis that investigates functions of complex numbers. It is helpful in many branches of mathematics, including algebrai ...

s and conjugate functions in

Euclidean space Euclidean space is the fundamental space of geometry, intended to represent physical space. Originally, that is, in Euclid's ''Elements'', it was the three-dimensional space of Euclidean geometry, but in modern mathematics there are Euclidean sp ...

s. In the applied field his work includes the propagation of waves in elastic media with plane boundaries (with

Sergei Sobolev Prof Sergei Lvovich Sobolev (russian: Серге́й Льво́вич Со́болев) HFRSE (6 October 1908 – 3 January 1989) was a Soviet mathematician working in mathematical analysis and partial differential equations. Sobolev introdu ...

) and the oscillations of elastic spheres. His pioneering approach to solving the initial-boundary value problem to the wave equation formed the basis of the spacetime triangle diagram (STTD) technique for wave motion developed by his follower

Victor Borisov Victor Vasil'evich Borisov (russian: Виктор Васильевич Борисов) (31 October 1937 – 5 December 2013) was a Russian physicist and mathematician who contributed to the theory of wave motion, in particular to time domain e ...

(also known as the Smirnov method of incomplete separation of variables). Smirnov was a Ph.D. student of Vladimir Steklov. Among his notable students were Sergei Sobolev, Solomon Mikhlin and Nobel prize winner

Leonid Kantorovich Leonid Vitalyevich Kantorovich ( rus, Леони́д Вита́льевич Канторо́вич, , p=lʲɪɐˈnʲit vʲɪˈtalʲjɪvʲɪtɕ kəntɐˈrovʲɪtɕ, a=Ru-Leonid_Vitaliyevich_Kantorovich.ogg; 19 January 19127 April 1986) was a Sovie ...

Smirnov is also widely known among students for his five volume series (in seven books) ''A Course in Higher Mathematics'' (Курс высшей математики) (the first volume was written jointly with

Jacob Tamarkin Jacob David Tamarkin (russian: Я́ков Дави́дович Тама́ркин, ''Yakov Davidovich Tamarkin''; 11 July 1888 – 18 November 1945) was a Russian-American mathematician best known for his work in mathematical analysis. Biography ...

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* * {{DEFAULTSORT:Smirnov, Vladimir 1887 births 1974 deaths Soviet mathematicians Mathematicians from Saint Petersburg Saint Petersburg State University alumni Perm State University faculty Full Members of the USSR Academy of Sciences