IMI Interdisciplinary Mathematics InstituteCollege of Arts and Sciences

Weighted approximation on the unit sphere

  • Sept. 9, 2004
  • 3:30 p.m.
  • LeConte 312


For a family of weighted functions invariant under a finite reflection group, the direct and inverse theorems are established for the best approximation in the weighted L^p space on the unit sphere of R^d. The theorems are stated using a modulus of smoothness of higher order, defined through a generalized spherical means, which is shown to be equivalent to a K-functional, defined using the power of the spherical h-Laplacian.

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