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 structure-preserving kernel method for learning Hamiltonian systems
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by Jianyu Hu, Juan-Pablo Ortega and Daiying Yin;
Math. Comp.
DOI: https://doi.org/10.1090/mcom/4106
Published electronically: June 16, 2025

Abstract:

A structure-preserving kernel ridge regression method is presented that allows the recovery of nonlinear Hamiltonian functions out of datasets made of noisy observations of Hamiltonian vector fields. The method proposes a closed-form solution that yields excellent numerical performances that surpass other techniques proposed in the literature in this setup. From the methodological point of view, the paper extends kernel regression methods to problems in which loss functions involving linear functions of gradients are required and, in particular, a differential reproducing property and a Representer Theorem are proved in this context. The relation between the structure-preserving kernel estimator and the Gaussian posterior mean estimator is analyzed. A full error analysis is conducted that provides convergence rates using fixed and adaptive regularization parameters. The good performance of the proposed estimator together with the convergence rate is illustrated with various numerical experiments.
References
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Bibliographic Information
  • Jianyu Hu
  • Affiliation: Division of Mathematical Sciences, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
  • MR Author ID: 1321698
  • ORCID: 0000-0002-7343-3638
  • Email: Jianyu.Hu@ntu.edu.sg
  • Juan-Pablo Ortega
  • Affiliation: Division of Mathematical Sciences, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
  • MR Author ID: 631736
  • ORCID: 0000-0002-5412-9622
  • Email: Juan-Pablo.Ortega@ntu.edu.sg
  • Daiying Yin
  • Affiliation: Division of Mathematical Sciences, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
  • MR Author ID: 1591037
  • Email: YIND0004@e.ntu.edu.sg
  • Received by editor(s): March 15, 2024
  • Received by editor(s) in revised form: April 3, 2025
  • Published electronically: June 16, 2025
  • Additional Notes: The authors received partial financial support from the School of Physical and Mathematical Sciences of the Nanyang Technological University. The third author was funded by the Nanyang President’s Graduate Scholarship of Nanyang Technological University. Financial support from Singapore’s Ministry of Education Tier 1 grant RG100/24 entitled “Kernel methods for global structure preserving machine learning” is also ackowledged.
  • © Copyright 2025 American Mathematical Society
  • Journal: Math. Comp.
  • MSC (2020): Primary 70Hxx, 68Q27, 68T09
  • DOI: https://doi.org/10.1090/mcom/4106