e/Inversion in a point

Information
has gloss	eng: In Euclidean geometry, the inversion of a point X in respect to a point P is a point X* such that P is the midpoint of the line segment with endpoints X and X. In other words, the vector from X to P is the same as the vector from P to X.
lexicalization	eng: inversion in a point
instance of	c/Euclidean symmetries

Meaning
Chinese
has gloss	zho: 在欧几里得几何中，点 X 关于一个点 P 的反演是点 X* 使得 P 是以 X 和 X* 为端点的线段的中点。换句话说，从 X 到 P 的向量同于从 P 到 X* 的向量。
lexicalization	zho: 点反演