其他特殊矩阵形式和定义: 令 A zero matrix has all elements equal to zero.(零 矩阵) 000 000 000 o a diagonal matrix is a square matrix that has elements of zero, except down the main diagonal. (对角矩阵) 100 020 005 2021/2/22 cxt2021/2/22 9 cxt 其他特殊矩阵形式和定义： ❖ A zero matrix has all elements equal to zero.（零 矩阵） ❖ A diagonal matrix is a square matrix that has elements of zero, except down the main diagonal. （对角矩阵） 000 000 000           1 0 0 0 2 0 0 0 5          