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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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Convergence of collocation schemes for boundary value problems in nonlinear index 1 DAEs with a singular point
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by Alexander Dick, Othmar Koch, Roswitha März and Ewa Weinmüller PDF
Math. Comp. 82 (2013), 893-918 Request permission

Abstract:

We analyze the convergence behavior of collocation schemes applied to approximate solutions of BVPs in nonlinear index 1 DAEs, which exhibit a critical point at the left boundary. Such a critical point of the DAE causes a singularity in the inherent nonlinear ODE system. In particular, we focus on the case when the inherent ODE system is singular with a singularity of the first kind and apply polynomial collocation to the original DAE system. We show that for a certain class of well-posed boundary value problems in DAEs having a sufficiently smooth solution, the global error of the collocation scheme converges uniformly with the so-called stage order. Due to the singularity, superconvergence at the mesh points does not hold in general. The theoretical results are supported by numerical experiments.
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Additional Information
  • Alexander Dick
  • Affiliation: Vienna University of Technology, Institute for Analysis and Scientific Computing, Wiedner Hauptstraße 8–10, A-1040 Wien
  • Email: alex.dick@aon.at
  • Othmar Koch
  • Affiliation: Vienna University of Technology, Institute for Analysis and Scientific Computing, Wiedner Hauptstraße 8–10, A-1040 Wien
  • 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
  • Ewa Weinmüller
  • Affiliation: Vienna University of Technology, Institute for Analysis and Scientific Computing, Wiedner Hauptstraße 8–10, A-1040 Wien
  • Email: e.weinmueller@tuwien.ac.at
  • Received by editor(s): April 10, 2011
  • Received by editor(s) in revised form: September 27, 2011
  • Published electronically: September 10, 2012
  • © Copyright 2012 American Mathematical Society
    The copyright for this article reverts to public domain 28 years after publication.
  • Journal: Math. Comp. 82 (2013), 893-918
  • MSC (2010): Primary 65L80; Secondary 65L70
  • DOI: https://doi.org/10.1090/S0025-5718-2012-02637-8
  • MathSciNet review: 3008842