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StirlingS2

Usage

• StirlingS2[n, m] 给出第二型 的Stirling数.


Notes

• 整型数学函数 (参见A.3.10节).
• 给出把 个元素放入 个非空子集中的方法数.
• 参见 Mathematica 全书: 3.2.5节.
• 同时参见: StirlingS1.
Further Examples

These are the number of ways of partitioning a set of 5 elements into 2 non-empty subsets.

In[1]:=  

Out[1]=



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