Download or read book Geometrical Researches on the Theory of Parallels written by Nicholas Lobachevsky and published by Cosimo, Inc.. This book was released on 2007-05-01 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Lobachevsky believed that another form of geometry existed, a non-Euclidean geometry, and this 1840 treatise is his argument on its behalf. Line by line in this classic work he carefully presents a new and revolutionary theory of parallels, one that allows for all of Euclids axioms, except for the last. This 1891 translation includes a bibliography and translator George B. Halsteds essay on elliptic geometry. Russian mathematician NICHOLAS LOBACHEVSKY (17921856) is best remembered as the founder (along with Janos Bolyai) of non-Euclidean geometry. He is also the author of New Foundations of Geometry (18351838) and Pangeometry (1855)."