Voobrazhaemaja Geometr Ja Voobrozajemaja Geometrija Imaginary Geometry Kazan At The

by Nikolai Lobachevsky

$195,000 · Offered by Sophia Rare Books

First edition

Kazan: at the University Press, 1835; 1836. / First edition, extraordinarily rare offprints, of both parts of Lobachevsky's second publication on non-Euclidean or ‘imaginary’ geometry, following his epoch-making O nachalakh geometrii 1829-30 . From the library of Friedrich Engel, Lobachevsky's German translator. Where the 1829-30 papers had proceeded axiomatically, here Lobachevsky builds the new geometry analytically from its own

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