Julian Karol Sochocki (; ; February 2, 1842, in

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– December 14, 1927, in

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) was a

Polish Polish may refer to: * Anything from or related to Poland, a country in Europe * Polish language * Polish people, people from Poland or of Polish descent * Polish chicken * Polish brothers (Mark Polish and Michael Polish, born 1970), American twin ...

-Russian

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 ...

. His name is sometimes transliterated from Russian in several different ways (e.g. Sokhotski or Sochotski).

Life and work

Sochocki was born in

under the

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n domination to a Polish family, where he attended state gymnasium. In 1860 he registered at the physico-mathematical department of St Petersburg University. His study there was interrupted for the period 1860–1865 because of his involvement with Polish patriotic movement: he had to return to Warsaw to escape prosecution. In 1866 he graduated from the Department of Physics and Mathematics at the

University of Saint Petersburg Saint Petersburg State University (SPBGU; ) is a public research university in Saint Petersburg, Russia, and one of the oldest and most prestigious universities in Russia. Founded in 1724 by a decree of Peter the Great, the university from the be ...

. In 1868 he received his master's degree and in 1873 his

doctorate A doctorate (from Latin ''doctor'', meaning "teacher") or doctoral degree is a postgraduate academic degree awarded by universities and some other educational institutions, derived from the ancient formalism '' licentia docendi'' ("licence to teach ...

. His master's dissertation, practically the first text in Russian mathematical literature on

Cauchy Baron Augustin-Louis Cauchy ( , , ; ; 21 August 1789 – 23 May 1857) was a French mathematician, engineer, and physicist. He was one of the first to rigorously state and prove the key theorems of calculus (thereby creating real a ...

method of residues, was published in 1868. The dissertation itself contains many original grasps, which have been also ascribed to other mathematicians. His doctoral thesis contains the famous

Sokhotski–Plemelj theorem The Sokhotski–Plemelj theorem (Polish spelling is ''Sochocki'') is a theorem in complex analysis, which helps in evaluating certain integrals. The real-line version of it (#Version for the real line, see below) is often used in physics, although ...

. From 1868 Sochotcki lectured at the St Petersburg university, first as the "privat-docent", from 1882 as an ordinary professor, and from 1893 as a merited professor. In 1894 he was elected corresponding member of the

Polish Academy of Arts and Sciences The Polish Academy of Arts and Sciences or Polish Academy of Learning (, PAU), headquartered in Kraków and founded in 1872, is one of two institutions in contemporary Poland having the nature of an academy of sciences (the other being the Po ...

. Sochocki died on December 14, 1927, in a nursing home in

. Sochocki is mainly remembered for the Casorati–Sokhotski–Weierstrass theorem and for the Sokhotski–Plemelj theorem.

Selected publications

* ''Теорiя интегральныхъ вычетовъ с нѣкоторыми приложенiями'' (''A Theory of Integral Residues with Some Applications'') (1868) * ''Объ определенныхъ интегралахъ и функцiяхъ употребляемыхъ при разложенiяхъ въ ряды'' (''On Definite Integrals and Functions Used in Series Expansions'') (1873) * ''О суммахъ Гаусса и о законе взаимности символа Лежандра'' (''On Gauss Sums and the Reciprocity Law of the Legendre Symbol'') (1877) * ''Высшая алгебра'' (''Higher Algebra'') (St. Petersburg, 1882) * ''Теорiя чиселъ'' (''Number Theory'') (St. Petersburg, 1888) * ''Начало общего наибольшего делителя въ применении к теорiи делимости алгебраическихъ чиселъ'' (''The Principle of the Greatest Common Divisor Applied to Divisibility Theory of Algebraic Numbers'') (1893), ,

Notes

External links

Yulian Vasilievich Sokhotski
(in Russian) * *
Julian Karol Sochocki
Zentralblatt profile {{DEFAULTSORT:Sokhotski, Yulian Vasilievich Number theorists Saint Petersburg State University alumni Russian people of Polish descent Scientists from Warsaw Polish mathematicians 19th-century mathematicians from the Russian Empire 20th-century Russian mathematicians 1842 births 1927 deaths