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单词
even permutation
释义
WordReference Random House Unabridged Dictionary of American English © 2024
e
′
ven permuta
′
tion,
[
Math.
]
Mathematics
a permutation of a set of
n
elements,
x
1
,
x
2
, …
x
n
, that leaves unchanged the product of all differences of the form (
x
i
— x
j
), where
i
is less than
j.
Cf.
odd permutation.
1930–35
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更新时间:2025/12/3 4:40:29