Definition of Lobachevsky, Nikolai Ivanovich in English:

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Lobachevsky, Nikolai Ivanovich

Pronunciation: /ˌlɒbəˈtʃɛfski/
(1792–1856), Russian mathematician. At about the same time as Gauss and János Bolyai (1802–60), he independently discovered non-Euclidean geometry. His work was not widely recognized until the non-Euclidean nature of space-time was revealed by the general theory of relativity.
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