Nikolai Lobachevsky

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.

Notable works: hyperbolic geometry, Test of Lobachevsky, Graeffe's method, Lobachevsky integral formula Awards: Order of Saint Anna, 1st class, Order of Saint Anna, 2nd class, Order of Saint Stanislaus, 1st class, Order of Saint Stanislaus, 2nd class, Order of St. Vladimir, 4th class, Order of St. Vladimir the Equal-to-the-Apostles (3rd class) Education: Kazan Imperial University

Source: Wikipedia — https://en.wikipedia.org/wiki/Nikolai_Lobachevsky