Even permutation
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A permutation obtained as the product of an even number of permutations. For example, are even permutations. The set of permutations of n numbers 1, 2, 3, ..., n contains n !/2 even permutations. For example, in the permutation of the three numbers 1, 2, and 3, the even permutations are 123, 231, and 312, when the original sequence is 123. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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偶数個の互換の積として得られる置換をいう。たとえば， などは偶置換である。 n 個の数字 1，2，3，…，n の置換の全体は n!/2 個の偶置換を含んでいる。たとえば，3個の数1，2，3の置換では，偶置換はもとの列を 123とするとき 123，231，312の3個である。 出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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