**The Elements of Non-Euclidean Geometry**

by D.M.Y. Sommerville

**Publisher**: G.Bell & Sons Ltd. 1914**ISBN/ASIN**: 0486442225**Number of pages**: 158

**Description**:

Renowned for its lucid yet meticulous exposition, this text follows the development of non-Euclidean geometry from a fundamental analysis of the concept of parallelism to such advanced topics as inversion and transformations. It features the relation between parataxy and parallelism, the absolute measure, the pseudosphere, and Gauss' proof of the defect-area theorem.

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