...可以把其「循环式改写成奇数个对换的复合,那么该排列称为「奇排列(Odd Permutation),否则就是「偶排列(Even Permutation)。根据这个定义,前述的(ABC)(DEF)是一个「偶排列。
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gerade permutation even permutation 偶置换
even permutation polytope 偶置换多面体
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