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Mathematics of Computation

Published by the American Mathematical Society since 1960 (published as Mathematical Tables and other Aids to Computation 1943-1959), Mathematics of Computation is devoted to research articles of the highest quality in computational mathematics.

ISSN 1088-6842 (online) ISSN 0025-5718 (print)

The 2020 MCQ for Mathematics of Computation is 1.78.

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Accurate inverses for computing eigenvalues of extremely ill-conditioned matrices and differential operators
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by Qiang Ye PDF
Math. Comp. 87 (2018), 237-259 Request permission

Abstract:

This paper is concerned with computations of a few smallest eigenvalues (in absolute value) of a large extremely ill-conditioned matrix. It is shown that a few smallest eigenvalues can be accurately computed for a diagonally dominant matrix or a product of diagonally dominant matrices by combining a standard iterative method with the accurate inversion algorithms that have been developed for such matrices. Applications to the finite difference discretization of differential operators are discussed. In particular, a new discretization is derived for the 1-dimensional biharmonic operator that can be written as a product of diagonally dominant matrices. Numerical examples are presented to demonstrate the accuracy achieved by the new algorithms.
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Additional Information
  • Qiang Ye
  • Affiliation: Department of Mathematics, University of Kentucky, Lexington, Kentucky 40506
  • MR Author ID: 237891
  • Email: qye3@uky.edu
  • Received by editor(s): December 28, 2015
  • Received by editor(s) in revised form: June 14, 2016, and August 24, 2016
  • Published electronically: May 11, 2017
  • Additional Notes: This research was supported in part by NSF Grants DMS-1317424, DMS-1318633 and DMS-1620082
  • © Copyright 2017 American Mathematical Society
  • Journal: Math. Comp. 87 (2018), 237-259
  • MSC (2010): Primary 65F15, 65F35, 65N06, 65N25
  • DOI: https://doi.org/10.1090/mcom/3223
  • MathSciNet review: 3716195