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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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Collocation methods for index 1 DAEs with a singularity of the first kind
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by Othmar Koch, Roswitha März, Dirk Praetorius and Ewa Weinmüller PDF
Math. Comp. 79 (2010), 281-304 Request permission

Abstract:

We study the convergence behavior of collocation schemes applied to approximate solutions of BVPs in linear index 1 DAEs which exhibit a critical point at the left boundary. Such a critical point of the DAE causes a singularity within the inherent ODE system. We focus our attention on the case when the inherent ODE system is singular with a singularity of the first kind, apply polynomial collocation to the original DAE system and consider different choices of the collocation points such as equidistant, Gaussian or Radau points. We show that for a well-posed boundary value problem for DAEs having a sufficiently smooth solution, the global error of the collocation scheme converges with the order $O(h^s)$, where $s$ is the number of collocation points. Superconvergence cannot be expected in general due to the singularity, not even for the differential components of the solution. The theoretical results are illustrated by numerical experiments.
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Additional Information
  • Othmar Koch
  • Affiliation: Vienna University of Technology, Institute for Analysis and Scientific Computing, Wiedner Hauptstr. 8–10, A-1040 Wien, Austria
  • Email: othmar@othmar-koch.org
  • Roswitha März
  • Affiliation: Humboldt-Universität of Berlin, Institute for Mathematics, Unter den Linden 6, D-10099 Berlin, Germany
  • Email: maerz@mathematik.hu-berlin.de
  • Dirk Praetorius
  • Affiliation: Vienna University of Technology, Institute for Analysis and Scientific Computing, Wiedner Hauptstr. 8–10, A-1040 Wien, Austria
  • MR Author ID: 702616
  • ORCID: 0000-0002-1977-9830
  • Email: dirk.praetorius@tuwien.ac.at
  • Ewa Weinmüller
  • Affiliation: Vienna University of Technology, Institute for Analysis and Scientific Computing, Wiedner Hauptstr. 8–10, A-1040 Wien, Austria
  • Email: ewa.weinmueller@tuwien.ac.at
  • Received by editor(s): April 29, 2008
  • Received by editor(s) in revised form: March 4, 2009
  • Published electronically: June 25, 2009
  • © Copyright 2009 American Mathematical Society
    The copyright for this article reverts to public domain 28 years after publication.
  • Journal: Math. Comp. 79 (2010), 281-304
  • MSC (2000): Primary 65L80; Secondary 65L70
  • DOI: https://doi.org/10.1090/S0025-5718-09-02267-4
  • MathSciNet review: 2552227