Nikolai
Lobachevsky (1 déc. 1792 – 24 févr. 1856)
Description:
Nikolay Lobachevsky (Николай Лобачевский) is a mathematician, creator of hyperbolic geometry (AKA "Lobachevsky geometry" or "non-Euclidean geometry"), a public education activist, "Copernicus of geometry".
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