COMBINATORICA 程序包符号

NumberOfDerangements

NumberOfDerangements[n]
counts the derangements on elements, that is, the permutations without any fixed points.

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To use , you first need to load the Combinatorica Package using Needs["Combinatorica`"].

参见 参见

DerangementQ Derangements

教程 教程

Combinatorica

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