Computing

, Volume 74, Issue 3, pp 249–271 | Cite as

Approximation of Integral Operators by Open image in new window-Matrices with Adaptive Bases

Article

Abstract

Open image in new window-matrices can be used to construct efficient approximations of discretized integral operators. The Open image in new window-matrix approximation can be constructed efficiently by interpolation, Taylor or multipole expansion of the integral kernel function, but the resulting representation requires a large amount of storage.

In order to improve the efficiency, local Schur decompositions can be used to eliminate redundant functions from an original approximation, which leads to a significant reduction of storage requirements and algorithmic complexity.

AMS Subject Classifications:

45B05 65N38 65F30 

Keywords

Hierarchical matrices data-sparse approximation nested bases 

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Copyright information

© Springer-Verlag Wien 2005

Authors and Affiliations

  1. 1.Max-Planck-Institut für Mathematik in den NaturwissenschaftenLeipzigGermany

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