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单词
derangement numbers
释义
derangement numbers
derangement numbers
[
di′rānj·mənt ‚nəm·bərz
]
(mathematics)
The numbers
D
n
, n
= 1, 2, 3, …, giving the number of permutations of a set of
n
elements that carry no element of the set into itself.
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更新时间:2025/3/25 0:48:48