Document Type

Article

Publication Date

5-2014

Abstract

Quadrature formulas for spheres, the rotation group, and other compact, homogeneous manifolds are important in a number of applications and have been the subject of recent research. The main purpose of this paper is to study coordinate independent quadrature (or cubature) formulas associated with certain classes of positive definite and conditionally positive definite kernels that are invariant under the group action of the homogeneous manifold. In particular, we show that these formulas are accurate—optimally so in many cases—and stable under an increasing number of nodes and in the presence of noise, provided the set X of quadrature nodes is quasi-uniform. The stability results are new in all cases. In addition, we may use these quadrature formulas to obtain similar formulas for manifolds diffeomorphic to Sn, oblate spheroids for instance. The weights are obtained by solving a single linear system. For S2, and the restricted thin plate spline kernel r2log r, these weights can be computed for two-thirds of a million nodes, using a preconditioned iterative technique introduced by us.

Copyright Statement

This is an author-produced, peer-reviewed version of this article. The final publication is available at www.springerlink.com. Copyright restrictions may apply. doi: 10.1007/s00211-013-0581-1

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