collineation

some simple groups and collineation groups of projective planes

若干单群与射影平面直射群

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2-d projective collineation provides an ideal mathematical tool for describing planar element correspondence in multiple views.

在描述多视图的几何元素对应关系方面，2-D射影变换是一种有力工具。

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the single vanishing point drawing method of perspective collineation for parallel oblique perspective of building outline

建筑形体平行斜透视的透射变换单灭点作图法

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The main result: Let q be a power of a prime, and if G is a collineation group of a projective plane and G acts transitively on the points, then G is not isomorphic to PSU ( 3, q~ 2).

得到主要结果：令q是素数方幂，若G是一个射影平面的共线变换群并且传递地作用在点集合上，则G不能与PSU（3，q2）同构。

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