# Nikolai Lobachevsky

## Russian mathematician / From Wikipedia, the free encyclopedia

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"Lobachevsky" redirects here. For other uses, see Lobachevsky (disambiguation).

In this name that follows Eastern Slavic naming customs, the patronymic is

*Ivanovich*and the family name is*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.

**Quick Facts**Born, Died ...

Nikolai Lobachevsky | |
---|---|

Николай Лобачевский | |

Born | 1 December 1792^{[lower-alpha 1]}^{[lower-alpha 2]}Makaryev, ^{[lower-alpha 3]} Makaryevsky Uyezd, Nizhny Novgorod Governorate,^{[lower-alpha 4]}^{[5]}^{[lower-alpha 5]} Russian Empire (now Makaryevo, Nizhny Novgorod Oblast, Russia) |

Died | 24 February 1856 (1856-02-25) (aged 63) |

Education | Kazan University (MSc, 1811) |

Known for | Lobachevskian geometry |

Scientific career | |

Fields | Geometry |

Academic advisors | J. C. M. Bartels^{[8]}^{[9]} |

Notable students | Nikolai Brashman^{[8]} |

Signature | |

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William Kingdon Clifford called Lobachevsky the "Copernicus of Geometry" due to the revolutionary character of his work.^{[lower-alpha 6]}^{[lower-alpha 7]}