Data-sparse approximation of a class of operator-valued functions

revised version: February 2004
Ivan P. Gavrilyuk, Wolfgang Hackbusch, and Boris N. Khoromskij
(Please use for correspondence this email).

Submission date: 10. Mar. 2003
Pages: 26
published in: Mathematics of computation, 74 (2004) 250, p. 681-708 (electronic) 
DOI number (of the published article): S 0025-5718(04)01703-X
MSC-Numbers: 65F50, 65F30
Keywords and phrases: data-sparse approximation, operator-valued functions
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Abstract:
In previous papers a method for the data-sparse approximation of the solution operators for elliptic, parabolic and hyperbolic PDEs has been developed based on the Dunford-Cauchy representation to the operator-valued functions of interest combined with the hierarchical matrix approximation of the operator resolvents. In the present paper, we discuss how these techniques can be applied to approximate a hierarchy of operator-valued functions generated by an elliptic operator.