Non-Euclidian geometry :   / Bonola, Roberto.;  -- New York/ : Dover Publications, 1955.

268 p.

The attempts to prove Euclid's postulate;The Forerunners of non-euclidean geometry;The founders of non-euclidean geometry;The later development of non-euclidean geometry;The fundamentals principles of statics and Euclid's postulate;Clifford's parallels and surface. Sketch of Clifford-Klein's problems;The non-euclidean parallel construction and other allied constructions;The independence of projective geomtry from Euclid's postulate;The impossibility of proving Euclid's postulate;The science of absolute space por John Bolyai;The theory of parallels por Nicholas Lobachevski

514.13