Zhe Zhang
Abstract
According to the Transformation Group theory of Klein,Euclidean geometry is a sub-geometry of projective geometry.So theory of projective geometry has certain significance on Euclidean geometry.This article studies on the collinear of elementary Geometry with theory of projective geometry.
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According to the Transformation Group theory of Klein,Euclidean geometry is a sub-geometry of projective geometry.So theory of projective geometry has certain significance on Euclidean geometry.This article studies on the collinear of elementary Geometry with theory of projective geometry.
Key concepts: Projective geometry, Geometry, Ordered geometry, Euclidean geometry, Projective differential geometry, Absolute geometry, Transformation geometry, Synthetic geometry