Julian Karol Sochocki (russian: Юлиан Васильевич Сохоцкий; pl, Julian Karol Sochocki; February 2, 1842 in

Warsaw Warsaw ( pl, Warszawa, ), officially the Capital City of Warsaw,, abbreviation: ''m.st. Warszawa'' is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland, and its population is official ...

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– December 14, 1927 in

Leningrad 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 ...

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) was a Russian-

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. 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

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-eigh ...

n domination to a Polish family, where he attended state gymnasium. In 1860 he registered at the physico-mathematical department of

St Petersburg University Saint Petersburg State University (SPBU; russian: Санкт-Петербургский государственный университет) is a public research university in Saint Petersburg, Russia. Founded in 1724 by a decree of Peter the G ...

. His study there was interrupted for the period 1860–1865 because of his involvement with Polish nationalist 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. In 1868 he received his master's degree and in 1873 his

doctorate A doctorate (from Latin ''docere'', "to teach"), doctor's degree (from Latin ''doctor'', "teacher"), or doctoral degree is an academic degree awarded by universities and some other educational institutions, derived from the ancient formalism '' ...

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

Cauchy Baron Augustin-Louis Cauchy (, ; ; 21 August 178923 May 1857) was a French mathematician, engineer, and physicist who made pioneering contributions to several branches of mathematics, including mathematical analysis and continuum mechanics. He ...

method of

residues Residue may refer to: Chemistry and biology * An amino acid, within a peptide chain * Crop residue, materials left after agricultural processes * Pesticide residue, refers to the pesticides that may remain on or in food after they are appli ...

, 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. 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

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. 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