A Note on Some Approximation Kernels on the Sphere
We produce precise estimates for the Kogbetliantz kernel for the approximation of functions on the sphere. Furthermore, we propose and study a new approximation kernel, which has slightly better properties.
The author is supported by the Austrian Science Fund FWF projects F5503 (part of the Special Research Program (SFB) “Quasi-Monte Carlo Methods: Theory and Applications”) and W1230 (Doctoral Program “Discrete Mathematics”). The author is grateful to two anonymous referees for their many helpful comments.
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