余因数矩阵 cofactor matrix 整数矩阵 integral matrix ..
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This paper elaborates several features of the sum of the cofactor of a determinant and provides the method to calculate the determinant of a Matrix by the sum of the cofactor of a determinant.
给出有关代数余子式之和的几个性质并予以证明，且给出利用代数余子式之和计算行列式的方法。
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