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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.

What is MCQ? The Mathematical Citation Quotient (MCQ) measures journal impact by looking at citations over a five-year period. Subscribers to MathSciNet may click through for more detailed information.

 

Fast component-by-component construction of lattice algorithms for multivariate approximation with POD and SPOD weights
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by Ronald Cools, Frances Y. Kuo, Dirk Nuyens and Ian H. Sloan HTML | PDF
Math. Comp. 90 (2021), 787-812 Request permission

Abstract:

In a recent paper by the same authors, we provided a theoretical foundation for the component-by-component (CBC) construction of lattice algorithms for multivariate $L_2$ approximation in the worst case setting, for functions in a periodic space with general weight parameters. The construction led to an error bound that achieves the best possible rate of convergence for lattice algorithms. Previously available literature covered only weights of a simple form commonly known as product weights. In this paper we address the computational aspect of the construction. We develop fast CBC construction of lattice algorithms for special forms of weight parameters, including the so-called POD weights and SPOD weights which arise from PDE applications, making the lattice algorithms truly applicable in practice. With $d$ denoting the dimension and $n$ the number of lattice points, we show that the construction cost is $\mathcal {O}(d n\log (n) + d^2\log (d) n)$ for POD weights, and $\mathcal {O}(d n\log (n) + d^3\sigma ^2 n)$ for SPOD weights of degree $\sigma \ge 2$. The resulting lattice generating vectors can be used in other lattice-based approximation algorithms, including kernel methods or splines.
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Additional Information
  • Ronald Cools
  • Affiliation: Department of Computer Science, KU Leuven, Celestijnenlaan 200A, 3001 Leuven, Belgium
  • MR Author ID: 51325
  • ORCID: 0000-0002-5567-5836
  • Email: ronald.cools@cs.kuleuven.be
  • Frances Y. Kuo
  • Affiliation: School of Mathematics and Statistics, University of New South Wales, Sydney, New South Wales 2052, Australia
  • MR Author ID: 703418
  • Email: f.kuo@unsw.edu.au
  • Dirk Nuyens
  • Affiliation: Department of Computer Science, KU Leuven, Celestijnenlaan 200A, 3001 Leuven, Belgium
  • MR Author ID: 777310
  • ORCID: 0000-0002-4555-2314
  • Email: dirk.nuyens@cs.kuleuven.be
  • Ian H. Sloan
  • Affiliation: School of Mathematics and Statistics, University of New South Wales, Sydney, New South Wales 2052, Australia
  • MR Author ID: 163675
  • ORCID: 0000-0003-3769-0538
  • Email: i.sloan@unsw.edu.au
  • Received by editor(s): October 14, 2019
  • Received by editor(s) in revised form: July 23, 2020
  • Published electronically: December 1, 2020
  • Additional Notes: The authors gratefully acknowledge the financial support from the Australian Research Council (ARC DP180101356) and the Research Foundation – Flanders (FWO G091920N)
  • © Copyright 2020 American Mathematical Society
  • Journal: Math. Comp. 90 (2021), 787-812
  • MSC (2020): Primary 41A10, 41A15, 65D30, 65D32, 65T40
  • DOI: https://doi.org/10.1090/mcom/3586
  • MathSciNet review: 4194162