Boolean matrix sum 布尔矩阵和
column sum of a matrix 矩阵的列和
sum matrix 和阵
row sum of a matrix 矩阵的行和
constant-sum matrix 常数总额矩阵
matrix direct sum 矩阵直接和
sum of matrix 矩阵求和
finite-sum matrix equation 有限和矩阵方程
direct sum of matrix 矩阵的直接和
The definition of similar quasi-direct sum of matrix is introduced. Andthe connection with group inverse is discussed. Some properties and applications are obtained.
首先引入矩阵的相似准直和的定义，讨论了它和群逆的关系，得到了一些性质和应用．。
And three modified attribute reduction algorithms are presented, including modified algebraic algorithm, weighed sum of attribute significance algorithm and modified discernible matrix algorithm.
提出了三种改进的属性约简算法：改进的代数集合算法、重要度加权平均算法和改进的可辨识矩阵算法。
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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