Asymptotic independence for unimodal densities

Details Asymptotic independence for unimodal densities Asymptotic independence for unimodal densities

2009-12-22

arxiv.org/abs/0912.4331v1

Mathematics

Probability

33 pages, 4 figures

Scientific paper

Asymptotic independence of the components of random vectors is a concept used in many applications. The standard criteria for checking asymptotic independence are given in terms of distribution functions (dfs). Dfs are rarely available in an explicit form, especially in the multivariate case. Often we are given the form of the density or, via the shape of the data clouds, one can obtain a good geometric image of the asymptotic shape of the level sets of the density. This paper establishes a simple sufficient condition for asymptotic independence for light-tailed densities in terms of this asymptotic shape. This condition extends Sibuya's classic result on asymptotic independence for Gaussian densities.

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