Measures Of Symmetry
Tags: :
Generalizing the idea of “symmetric distribution” from 1D to multivariate is quite interesting and not trivial.
Here are some possible generalizetions:
Spherical Symmetry
\(X - \theta \sim A (X - \theta)\) For a rotation matrix $A$.
Elliptical Symmetry
Central Symmetry
A.k.a. “reflectively” or “diagonally” or “simply” or “antipodally” symmetric: \(X - \theta \sim \theta - X\)
Angular Symmetry
[1] Serfling, Robert J. “Multivariate Symmetry and Asymmetry.” In Encyclopedia of Statistical Sciences. John Wiley & Sons, Inc., 2004. http://onlinelibrary.wiley.com/doi/10.1002/0471667196.ess5011/abstract.
Written on