These observations allow one to formalize the definition of reflection: a reflection is an involutive isometry of an Euclidean space whose set of fixed points is an affine subspace of codimension 1.
这些观察们形式化反射
定义: 反射是欧几里得空
对合等距同构,它
不动点集合是余维
1
仿射子空
。