English

Behavior of Fr\'echet mean and Central Limit Theorems on spheres

Statistics Theory 2020-04-28 v2 Statistics Theory

Abstract

We compute higher derivatives of the Fr\'{e}chet function on spheres with an absolutely continuous and rotationally symmetric probability distribution. Consequences include (i)~a practical condition to test if the mode of the symmetric distribution is a local Fr\'{e}chet mean; (ii)~a Central Limit Theorem on spheres with practical assumptions and an explicit limiting distribution; and (iii)~an answer to the question of whether the smeary effect can occur on spheres with absolutely continuous and rotationally symmetric distributions: with the method presented here, it can in dimension at least~44.

Keywords

Cite

@article{arxiv.1911.01985,
  title  = {Behavior of Fr\'echet mean and Central Limit Theorems on spheres},
  author = {Do Tran},
  journal= {arXiv preprint arXiv:1911.01985},
  year   = {2020}
}