2 papers
math.PR2023
Exchangeability and irreducible rotational invariance
Paolo Baldi, Domenico Marinucci, Stefano Trapani
In this note we prove that a finite family of real r.v.'s that is exchangeable and such that is invariant with respect to a subgroup of $SO(d)…
math.ST2008
Adaptive density estimation for directional data using needlets
P. Baldi, G. Kerkyacharian, D. Marinucci +1
This paper is concerned with density estimation of directional data on the sphere. We introduce a procedure based on thresholding on a new type of spherical wavelets called {\it ne…