Covariance of centered distributions on manifold

Details Covariance of centered distributions on manifold Covariance of centered distributions on manifold

2008-05-06

arxiv.org/abs/0805.0732v1

Mathematics

Statistics Theory

17 pages, 4 figures

Scientific paper

We define and study a family of distributions with domain complete Riemannian manifold. They are obtained by projection onto a fixed tangent space via the inverse exponential map. This construction is a popular choice in the literature for it makes it easy to generalize well known multivariate Euclidean distributions. However, most of the available solutions use coordinate specific definition that makes them less versatile. %We propose improvements in two directions. We define the distributions of interest in coordinate independent way by utilizing co-variant 2-tensors. Then we study the relation of these distributions to their Euclidean counterparts. In particular, we are interested in relating the covariance to the tensor that controls distribution concentration. We find approximating expression for this relation in general and give more precise formulas in case of manifolds of constant curvature, positive or negative. Results are confirmed by simulation studies of the standard normal distribution on the unit-sphere and hyperbolic plane.

Affiliated with

Also associated with

No associations

Rating

Covariance of centered distributions on manifold does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Covariance of centered distributions on manifold, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Covariance of centered distributions on manifold will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-209246