在诸多群中, 一个具有丰富资讯及性质的群就是矩阵群 (matrix group)。我们说 A 是一个 n × n 的矩阵, 指的是 A = (Aij), 其中 i, j = 1, 2, .
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结果表明，该方法是集结区间数判断矩阵群信息最有效的方法之一。
The result showed that the method was one of the most effective methods for aggregating group information under interval-number judgment matrixes.
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．。
The definition of similar quasi-direct sum of matrix is introduced. Andthe connection with group inverse is discussed. Some properties and applications are obtained.
在研究这类问题时，常用的理论方法有转移矩阵法、组合解法、重整化群方法及图形展开法等。
The usual ways to study the subject are the transfer-matrix method, combination solution, the renormalization-group technique, and graphic expansion, and so forth.
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