Nikolai Lobachevsky

Nikolai Lobachevsky

Nikolai Ivanovich Lobachevsky (Russian: Никола́й Ива́нович Лобаче́вский) (December 1, 1792 – February 24, 1856 (N.S.); November 20, 1792 – February 12, 1856 (O.S.)) was a Russian mathematician and geometer, renowned primarily for his pioneering works on hyperbolic geometry, otherwise known as Lobachevskian geometry. William Kingdon Clifford called Lobachevsky the "Copernicus of Geometry" due to the revolutionary character of his work.