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

允许我们形式化反射
定义: 反射是欧几里得空间
对合等距同构,它
不动点集合是余维度为 1 
仿射子空间。
 姻亲

称性
点;若发现问题,欢迎向我们指正。


