Lobachevsky, Nikolay Ivanovich
Russian mathematician
Nikolay Ivanovich Lobachevsky, (born Dec. 1 [Nov. 20, Old Style], 1792, Nizhny Novgorod, Russia—died Feb. 24 [Feb. 12, Old Style], 1856, Kazan), Russian mathematician and founder of non-Euclidean geometry, which he developed independently of János Bolyai and Carl Gauss. (Lobachevsky’s first publication on this subject was in 1829, Bolyai’s in 1832; Gauss never published his ideas on non-Euclidean geometry.)
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