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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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Local projection stabilization of equal order interpolation applied to the Stokes problem
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by Sashikumaar Ganesan, Gunar Matthies and Lutz Tobiska PDF
Math. Comp. 77 (2008), 2039-2060 Request permission

Abstract:

The local projection stabilization allows us to circumvent the Babuška–Brezzi condition and to use equal order interpolation for discretizing the Stokes problem. The projection is usually done in a two-level approach by projecting the pressure gradient onto a discontinuous finite element space living on a patch of elements. We propose a new local projection stabilization method based on (possibly) enriched finite element spaces and discontinuous projection spaces defined on the same mesh. Optimal order of convergence is shown for pairs of approximation and projection spaces satisfying a certain inf-sup condition. Examples are enriched simplicial finite elements and standard quadrilateral/hexahedral elements. The new approach overcomes the problem of an increasing discretization stencil and, thus, is simple to implement in existing computer codes. Numerical tests confirm the theoretical convergence results which are robust with respect to the user-chosen stabilization parameter.
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Additional Information
  • Sashikumaar Ganesan
  • Affiliation: Institut für Analysis und Numerik, Otto-von-Guericke-Universität Magdeburg, Postfach 4120, D-39016 Magdeburg, Germany
  • Email: ga.sashikumaar@mathematik.uni-magdeburg.de
  • Gunar Matthies
  • Affiliation: Fakultät für Mathematik, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany
  • MR Author ID: 641700
  • Email: gunar.matthies@ruhr-uni-bochum.de
  • Lutz Tobiska
  • Affiliation: Institut für Analysis und Numerik, Otto-von-Guericke-Universität Magdeburg, Postfach 4120, D-39016 Magdeburg, Germany
  • Email: tobiska@mathematik.uni-magdeburg.de
  • Received by editor(s): April 17, 2007
  • Received by editor(s) in revised form: September 21, 2007
  • Published electronically: May 9, 2008
  • © Copyright 2008 American Mathematical Society
    The copyright for this article reverts to public domain 28 years after publication.
  • Journal: Math. Comp. 77 (2008), 2039-2060
  • MSC (2000): Primary 65N12; Secondary 65N30
  • DOI: https://doi.org/10.1090/S0025-5718-08-02130-3
  • MathSciNet review: 2429873