Principles of Geometry (Paperback)

Preface; Preliminary; 1. General properties of conics; 2. Properties relative to two points of reference; 3. The equation of a line, and of a conic; 4. Restriction of the algebraic symbols. The distinction of real and imaginary elements; 5. Properties relative to an absolute conic. The notion of distance. Non-Euclidean geometry; Notes; Index.