nLab
reflection

This entry is about the concept in geometry/physics/linear algebra. For the concept in category theory see reflective subcategory


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Idea

Given a hyperplane? in a Euclidean space, then reflection at that hyperplane is the operation that sends each point to its mirror image at that hyperplane, the result of translating the point in the direction perpendicular? to the hyperplane by twice its distance to the hyperplane.

Last revised on April 17, 2018 at 11:57:13. See the history of this page for a list of all contributions to it.