Question
derangement is a permutation of the elements such that none appear in its original position. For example, the only derangements of {1,2,3} are {2,3,1} and
derangement is a permutation of the elements such that none appear in its original position. For example, the only derangements of {1,2,3} are {2,3,1} and {3,2,1} . How many derangements does {1,2,3,4} have?
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Applied Linear Algebra
Authors: Peter J. Olver, Cheri Shakiban
1st edition
131473824, 978-0131473829
