Skip to Main Content

St. Petersburg Mathematical Journal

This journal is a cover-to-cover translation into English of Algebra i Analiz, published six times a year by the mathematics section of the Russian Academy of Sciences.

ISSN 1547-7371 (online) ISSN 1061-0022 (print)

The 2020 MCQ for St. Petersburg Mathematical Journal is 0.68.

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.

 

Approximate approximations: recent developments in the computation of high dimensional potentials
HTML articles powered by AMS MathViewer

by F. Lanzara and G. Schmidt
St. Petersburg Math. J. 31 (2020), 355-370
DOI: https://doi.org/10.1090/spmj/1601
Published electronically: February 4, 2020

Abstract:

The paper is devoted to a fast method of an arbitrary high order for approximating volume potentials that is successful also in the high dimensional case. The cubature formulas have been obtained by using the basis functions introduced in the theory of approximate approximations. As basis functions, we choose products of Gaussians and special polynomials, for which the action of integral operators can be written as one-dimensional integrals with a separable integrand, i.e., a product of functions depending only on one of the variables. Then a separated representation of the density, combined with a suitable quadrature rule, leads to a separable representation of the integral operator. Since only one-dimensional operations are used, the resulting method is efficient also in the high dimensional case. We show how this new approach can be applied to the cubature of polyharmonic potentials, to potentials of elliptic differential operators acting on densities on hyper-rectangular domains, and to parabolic problems.
References
Similar Articles
  • Retrieve articles in St. Petersburg Mathematical Journal with MSC (2010): 65D32, 65-05
  • Retrieve articles in all journals with MSC (2010): 65D32, 65-05
Bibliographic Information
  • F. Lanzara
  • Affiliation: Department of Mathematics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy
  • Email: lanzara@mat.uniroma1.it
  • G. Schmidt
  • Affiliation: Lichtenberger Str. 12, 10178 Berlin, Germany
  • Email: schmidt.gunther@online.de
  • Received by editor(s): October 31, 2018
  • Published electronically: February 4, 2020

  • Dedicated: Dedicated to Vladimir Maz’ya on the occasion of his $80$th birthday
  • © Copyright 2020 American Mathematical Society
  • Journal: St. Petersburg Math. J. 31 (2020), 355-370
  • MSC (2010): Primary 65D32; Secondary 65-05
  • DOI: https://doi.org/10.1090/spmj/1601
  • MathSciNet review: 3937505