矩阵积和式的Ryser定理的应用

Application of Ryser Theorem of Matrix Product and Sum Formula

Ｒｙｓｅｒ定理给出了矩阵积和式的一个表达式。利用 Ｒｙｓｅｒ定理，得到了两个恒等式；证明了第二类Ｓｔｉｒｌｉｎｇ数的一个性质。

Ryser Theorem is an expression of Matrix product and Sum Formula, by which two identities are drawn, thereby proving the character of the Stirling number of the second kind.