The rate of convergence of sparse grid quadrature on the torus

Markus Hegland, Paul Charles Leopardi

Abstract


We examine sparse grid quadrature on Korobov spaces; that is, weighted tensor product reproducing kernel Hilbert spaces on the torus. We describe a dimension adaptive quadrature algorithm based on an algorithm of Hegland [ANZIAM J., 44(E):C335, 2003], and also formulate a version of Wasilkowski and Wozniakowski's weighted tensor product algorithm [J. Complexity, 15(3):402, 1999]. We claim that our algorithm is generally lower in cost than Wasilkowski and Wozniakowski's algorithm, and therefore both algorithms have the optimal asymptotic rate of convergence given by Theorem~3 of Wasilkowski and Wozniakowski. Even so, if the dimension weights decay slowly enough, both algorithms need a number of points exponential in the dimension to produce a substantial reduction in quadrature error.

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Keywords


quadrature; weighted Korobov space; sparse grids

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DOI: http://dx.doi.org/10.21914/anziamj.v52i0.3952



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