Nikolai Ivanovich Lobachevsky (1792–1856)

Born 1792 CE, died 1856 CE.

Nikolai Ivanovich Lobachevsky (; Russian: Никола́й Ива́нович Лобаче́вский, IPA: [nʲɪkɐˈlaj ɪˈvanəvʲɪtɕ ləbɐˈtɕefskʲɪj] ; 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. William Kingdon Clifford called Lobachevsky the "Copernicus of Geometry" due to the revolutionary character of his work.

Text from the Wikipedia article Nikolai_Lobachevsky, licensed CC BY-SA 4.0.

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Nikolai Ivanovich Lobachevsky

Text from the Wikipedia article Nikolai_Lobachevsky (revision 1371979028), licensed CC BY-SA 4.0.

Nikolai Ivanovich Lobachevsky (1792–1856)

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