Kernel Approximation on Manifolds II: The $L_{\infty}$-norm of the $L_2$-projector

Details Kernel Approximation on Manifolds II: The $L_{\infty}$-norm of the $L_2$-projector Kernel Approximation on Manifolds II: The $L_{\infty}$-norm of the $L_2$-projector

2010-05-13

arxiv.org/abs/1005.2424v2

SIAM J. Math. Anal. 43, pp. 662-684 (2011)

Mathematics

Classical Analysis and ODEs

25 pages; minor revision; new proof of Lemma 3.9; accepted for publication in SIAM J. on Math. Anal

Scientific paper

10.1137/100795334

This article addresses two topics of significant mathematical and practical interest in the theory of kernel approximation: the existence of local and stable bases and the L_p--boundedness of the least squares operator. The latter is an analogue of the classical problem in univariate spline theory, known there as the "de Boor conjecture". A corollary of this work is that for appropriate kernels the least squares projector provides universal near-best approximations for functions f\in L_p, 1\le p\le \infty.

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