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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 coderivatives and approximation of Hodge Laplace problems
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by Jeonghun J. Lee and Ragnar Winther PDF
Math. Comp. 87 (2018), 2709-2735 Request permission

Abstract:

The standard mixed finite element approximations of Hodge Laplace problems associated with the de Rham complex are based on proper discrete subcomplexes. As a consequence, the exterior derivatives, which are local operators, are computed exactly. However, the approximations of the associated coderivatives are nonlocal. In fact, this nonlocal property is an inherent consequence of the mixed formulation of these methods, and can be argued to be an undesired effect of these schemes. As a consequence, it has been argued, at least in special settings, that more local methods may have improved properties. In the present paper, we construct such methods by relying on a careful balance between the choice of finite element spaces, degrees of freedom, and numerical integration rules. Furthermore, we establish key convergence estimates based on a standard approach of variational crimes.
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Additional Information
  • Jeonghun J. Lee
  • Affiliation: The Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, Texas 78712
  • MR Author ID: 1067639
  • Email: jeonghun@ices.utexas.edu
  • Ragnar Winther
  • Affiliation: Department of Mathematics, University of Oslo, 0316 Oslo, Norway
  • MR Author ID: 183665
  • Email: rwinther@math.uio.no
  • Received by editor(s): October 27, 2016
  • Received by editor(s) in revised form: May 10, 2017, and July 21, 2017
  • Published electronically: March 26, 2018
  • Additional Notes: The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-2013) / ERC grant agreement 339643.
  • © Copyright 2018 American Mathematical Society
  • Journal: Math. Comp. 87 (2018), 2709-2735
  • MSC (2010): Primary 65N30
  • DOI: https://doi.org/10.1090/mcom/3315
  • MathSciNet review: 3834682