Nikolai Lobachevsky

Nikolai Ivanovich Lobachevsky (Russian: Никола́й Ива́нович Лобаче́вский, IPA: [nʲikɐˈlaj ɪˈvanəvʲɪtɕ ləbɐˈtɕɛfskʲɪj] ⓘ; 1 December [O.S. 20 November] 1792 – 24 February [O.S. 12 February] 1856) was a Russian mathematician and geometer, known primarily for his work on hyperbolic geometry, otherwise known as Lobachevskian geometry, and also for his fundamental study on Dirichlet integrals, known as the Lobachevsky integral formula.

"Lobachevsky" redirects here. For other uses, see Lobachevsky (disambiguation).
In this name that follows Eastern Slavic naming conventions, the patronymic is Ivanovich and the family name is Lobachevsky.
Nikolai Lobachevsky
Николай Лобачевский
Portrait by Lev Kryukov, c. 1839
Born1 December 1792
Makaryev, Makaryevsky Uyezd, Nizhny Novgorod Governorate, Russian Empire (now Makaryevo, Nizhny Novgorod Oblast, Russia)
Died24 February 1856 (1856-02-25) (aged 63)
Kazan, Kazan Governorate, Russian Empire (now Tatarstan, Russia)
EducationKazan University (MSc, 1811)
Known forLobachevskian geometry
Scientific career
FieldsGeometry
Academic advisorsJ. C. M. Bartels
Notable studentsNikolai Brashman
Signature

William Kingdon Clifford called Lobachevsky the "Copernicus of Geometry" due to the revolutionary character of his work.

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