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该文首开运用射影变换和矩阵研究四边形绝对值方程的先例,得到了平面凸四边形和凹四边形的绝对值方程,并给出了凸四边形和凹四边形的判定法则、面积公式,讨论了四边形的全等和相似及众多特殊四边形的解析特征。
In this paper, firstly, the absolute value equations of convex quadrilateral and concave quadrilaterals are obtained by using projective transformation and matrix as precedents for the study of quadrilateral absolute value equations. The rules and area formulas of convex quadrilateral and concave quadrilateral are given, And so on and many similar special quadrilateral analytical features.