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Minors

Usage

Minors[m] 用来给出矩阵m的子式.
Minors[m, k]用来给出 阶子式.


Notes

• 对一个  矩阵,Minors[m] 元素为去掉m 行第 列后得到的矩阵的行列式.
Map[Reverse, Minors[m],  0,1 ]使得 元素对应于去掉m 行第 列.
Minors[m] 等价于 Minors[m, n-1].
Minors[m, k] 给出通过从m选取每组可能的  行 和  列得到的  子矩阵的行列式.
• 结果中的每个元素对应于用特定位置列表选取行和列.元素的排序方式是使得在读出最后矩阵时,连续位置列表具有字典序的方式. • 对一个  矩阵 Minors[m, k] 得到一个  矩阵.
Minors[m, k, f] 把函数 f 而非 Det 用到选出的每个子矩阵上.
• 参见 Mathematica 全书: 3.7.7节.
• 同时参见: Det, Delete.
Further Examples

Here is a  x  matrix.

In[1]:=  

The matrix of all the  x  minors of M is not the same as the matrix of all minors of M.

In[2]:=  

Out[2]=

In[3]:=  

Out[3]=

Here is the ( ,  ) entry in the matrix of its minors.

In[4]:=  

Out[4]=

Here is the ( ,  ) entry in the matrix of its  x  minors.

In[5]:=  

Out[5]=

Here Tr is applied to each of the submatrices picked out.

In[6]:=  

Out[6]=



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