关于矩阵的特征多项式的展开式

On Characteristic Polynomial Expansion of A Matrix

利用复合阵的性质给出了矩阵的特征多项式展开式的一个新的（并且是很简明的）证明．并且利用“偏迹”给出了展开式的一个整沽的表达式．

The characteristic polynomial expansion of a matrix are proved by properties of compound matrix and a neat representative of expansion are given by 'partial trace