数学中,欧几里得群 E(n),或ISO(n)是n欧氏空间对称群。它的元素与基于欧氏距离等距同构相关,并被称为欧式等距同构欧式变换刚体变换


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维度

E(n)的自由度n(n + 1)/2,因此n = 2维情况下自由度是3,而n = 3维情况下自由度是6。其中,平移对称性贡献了其中n个自由度,而旋转对称性贡献了剩下的n(n − 1)/2个自由度。

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