| 释义 |
Examples:Lobachevsky's non-Euclidean geometry—great circle (in spherical geometry)—quadric surface (geometry)—generatrix (in geometry)—concentric arc (in spherical geometry)—positive semi-axis (in coordinate geometry)—ruler and compass construction (geometry)—Felix Klein's Erlangen program (1872) on geometry and group theory—Nikolai Ivanovich Lobachevsky (1793-1856), one of the discoverers of non-Euclidean geometry—(math.) Riemannian geometry—quadratic curve (geometry)—descriptive Geometry (three-dimensional geometry using projections and elevations)—the quotient of differences (slope of a line in coordinate geometry)—regular (figure in geometry)—János Bolyai (1802-1860), one of the discoverers of non-Euclidean geometry—method of coordinates (geometry)— |