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Higher Geometry - University of Colorado Denver
www-math.ucdenver.eduIntroduction Brief Historical Sketch Greeks (Thales, Euclid, Archimedes) Parallel Postulate Non-Euclidean Geometries Projective Geometry Revolution
Projective Geometry: A Short Introduction
morpheo.inrialpes.frence, one can infer theorems. The Euclidean geometry is based on mea-sures taken on rigid shapes, e.g. lengths and angles, hence the notion of shape invariance (under rigid motion) and also that (Euclidean) geometric properties are invariant under rigid motions. 15th century: the Euclidean geometry is not su cient to model perspec-tive ...