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 2024 MCQ for Mathematics of Computation is 1.78.

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Stability of structure-aware Taylor methods for tents
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by Jay Gopalakrishnan and Zheng Sun;
Math. Comp. 92 (2023), 1061-1086
DOI: https://doi.org/10.1090/mcom/3811
Published electronically: January 27, 2023

Abstract:

Structure-aware Taylor (SAT) methods are a class of timestepping schemes designed for propagating linear hyperbolic solutions within a tent-shaped spacetime region. Tents are useful to design explicit time marching schemes on unstructured advancing fronts with built-in locally variable timestepping for arbitrary spatial and temporal discretization orders. The main result of this paper is that an $s$-stage SAT timestepping within a tent is weakly stable under the time step constraint $\Delta t \leq Ch^{1+1/s}$, where $\Delta t$ is the time step size and $h$ is the spatial mesh size. Improved stability properties are also presented for high-order SAT time discretizations coupled with low-order spatial polynomials. A numerical verification of the sharpness of proven estimates is also included.
References
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Bibliographic Information
  • Jay Gopalakrishnan
  • Affiliation: Fariborz Maseeh Department of Mathematics and Statistics, Portland State University, P.O. Box 751, Portland, Oregon 97207
  • MR Author ID: 661361
  • ORCID: 0000-0001-7508-3232
  • Email: gjay@pdx.edu
  • Zheng Sun
  • Affiliation: Department of Mathematics, The University of Alabama, Box 870350, Tuscaloosa, Alabama 35487
  • ORCID: 0000-0003-3763-3015
  • Email: zsun30@ua.edu
  • Received by editor(s): March 9, 2022
  • Received by editor(s) in revised form: October 13, 2022
  • Published electronically: January 27, 2023
  • Additional Notes: The work of the first author was partially supported by the NSF grant DMS-1912779. The work of the second author was partially supported by the NSF grant DMS-2208391.
    The second author is the corresponding author.
  • © Copyright 2023 American Mathematical Society
  • Journal: Math. Comp. 92 (2023), 1061-1086
  • MSC (2020): Primary 65M12
  • DOI: https://doi.org/10.1090/mcom/3811
  • MathSciNet review: 4550320