Uniform Preconditioners of Linear Complexity for Problems of Negative Order

Author:

Stevenson Rob1,van Venetië Raymond1ORCID

Affiliation:

1. Korteweg-de Vries Institute for Mathematics , University of Amsterdam , P.O. Box 94248, 1090 GE Amsterdam , Netherlands

Abstract

Abstract We propose a multi-level type operator that can be used in the framework of operator (or Caldéron) preconditioning to construct uniform preconditioners for negative order operators discretized by piecewise polynomials on a family of possibly locally refined partitions. The cost of applying this multi-level operator scales linearly in the number of mesh cells. Therefore, it provides a uniform preconditioner that can be applied in linear complexity when used within the preconditioning framework from our earlier work [Uniform preconditioners for problems of negative order, Math. Comp. 89 (2020), 645–674].

Funder

Nederlandse Organisatie voor Wetenschappelijk Onderzoek

Publisher

Walter de Gruyter GmbH

Subject

Applied Mathematics,Computational Mathematics,Numerical Analysis

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