A sampling inequality for fractional order Sobolev semi-norms using arbitrary order data

Details A sampling inequality for fractional order Sobolev semi-norms using arbitrary order data A sampling inequality for fractional order Sobolev semi-norms using arbitrary order data

2008-01-26

arxiv.org/abs/0801.4097v3

Mathematics

Numerical Analysis

v3. fixes typos, notation, wording. v2. 14 pages, major conceptual changes

Scientific paper

To improve convergence results obtained using a framework for unsymmetric meshless methods due to Schaback (Preprint G\"ottingen 2006), we extend, in two directions, the Sobolev bound due to Arcang\'eli et al. (Numer Math 107, 181-211, 2007), which itself extends two others due to Wendland and Rieger (Numer Math 101, 643-662, 2005) and Madych (J. Approx Theory 142, 116-128, 2006). The first is to incorporate discrete samples of arbitrary order derivatives into the bound, which are used to obtain higher order convergence in higher order Sobolev norms. The second is to optimally bound fractional order Sobolev semi-norms, which are used to obtain more optimal convergence rates when solving problems requiring fractional order Sobolev spaces, notably inhomogeneous boundary value problems.

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