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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 2024 MCQ for Mathematics of Computation is 1.78.

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A manifold of planar triangular meshes with complete Riemannian metric
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by Roland Herzog and Estefanía Loayza-Romero;
Math. Comp. 92 (2023), 1-50
DOI: https://doi.org/10.1090/mcom/3775
Published electronically: September 12, 2022

Abstract:

Shape spaces are fundamental in a variety of applications including image registration, morphing, matching, interpolation, and shape optimization. In this work, we consider two-dimensional shapes represented by triangular meshes of a given connectivity. We show that the collection of admissible configurations representable by such meshes forms a smooth manifold. For this manifold of planar triangular meshes we propose a geodesically complete Riemannian metric. It is a distinguishing feature of this metric that it preserves the mesh connectivity and prevents the mesh from degrading along geodesic curves. We detail a symplectic numerical integrator for the geodesic equation in its Hamiltonian formulation. Numerical experiments show that the proposed metric keeps the cell aspect ratios bounded away from zero and thus avoids mesh degradation along arbitrarily long geodesic curves.
References
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Bibliographic Information
  • Roland Herzog
  • Affiliation: Interdisciplinary Center for Scientific Computing, Heidelberg University, 69120 Heidelberg, Germany
  • MR Author ID: 726929
  • ORCID: 0000-0003-2164-6575
  • Email: roland.herzog@iwr.uni-heidelberg.de
  • Estefanía Loayza-Romero
  • Affiliation: Institute for Analysis and Numerics, University of Münster, 48149 Münster, Germany
  • ORCID: 0000-0001-7919-9259
  • Email: estefania.loayza-romero@uni-muenster.de
  • Received by editor(s): January 26, 2021
  • Received by editor(s) in revised form: January 9, 2022
  • Published electronically: September 12, 2022
  • Additional Notes: The second author was partially funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy EXC 2044–390685587, Mathematics Münster: Dynamics–Geometry–Structure.
  • © Copyright 2022 American Mathematical Society
  • Journal: Math. Comp. 92 (2023), 1-50
  • MSC (2020): Primary 53Z50, 57Z25, 53C22
  • DOI: https://doi.org/10.1090/mcom/3775
  • MathSciNet review: 4496958