### permutation

• n. [数] 排列；[数] 置换

«
1 / 10
»

permutation 置换，排列组合

per-,完全的，-mut,改变，词源同mutual,mutable.用于数学名词置换，排列组合。

permutation (n.)
mid-14c., from Old French permutacion "change, shift" (14c.), from Latin permutationem (nominative permutatio) "a change, alteration, revolution," noun of action from past participle stem of permutare "change thoroughly, exchange," from per- "thoroughly" (see per) + mutare "to change" (see mutable).
1. Every sort of permutation and combination is possible in human nature.

2. Such a permutation is called a derangement.

3. Other enumeration problems lead us to the study of orbits of permutation groups.

4. The permutation is even if the number of inversions it contains is even.

5. Unique because that particular permutation has not appeared before.