New wavelet preconditioner for solving boundary integral equations over nonsmooth boundaries

Stuart C. Hawkins, K. Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Matrices obtained by wavelet discretisation of partial differential equations or boundary integral equations (BIEs) are typically sparse with a finger-like sparsity pattern, in contrast to matrices obtained by traditional single scale discretisation, which are dense. In some cases diagonal preconditioning is sufficient, but there are effective preconditioners that can be used when this is not the case. Here, we consider the particular case of BIEs whose boundary has a geometrical singularity, and propose a new preconditioning strategy based on permutations of the unknowns. The strategy's performance is analysed and compared with related techniques for the double layer equation for Laplace's equation.

Original languageEnglish
Pages (from-to)353-360
Number of pages8
JournalInternational Journal of Computer Mathematics
Volume81
Issue number3
DOIs
Publication statusPublished - Mar 2004
Externally publishedYes

Keywords

  • Boundary integral equation
  • Continuous wavelet discretisation
  • Geometric singularity
  • Permutation
  • Preconditioning

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