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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Efficient computation of Wiener-Hopf factorization of Markov-modulated Brownian motion
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by Changli Liu and Jungong Xue;
Math. Comp. 94 (2025), 2367-2408
DOI: https://doi.org/10.1090/mcom/4055
Published electronically: January 23, 2025

Abstract:

The Wiener-Hopf factorization, which is characterized as special solutions to a pair of nonlinear matrix equations, plays a crucial role in analysis of the Markov-modulated Brownian motion (mmbm). This paper deals with the general case where the diffusion coefficients are nonzero for some but not all states of the governing Markov chain. Based on a novel regrouping of the unknowns in the Wiener-Hopf factorization and a new form for the initialization phase, a doubling algorithm is proposed to solve the pair of nonlinear matrix equations simultaneously. With the parameters of the mmbm as input, this doubling algorithm is implemented in a subtraction-free manner to compute the Wiener-Hopf factorization to high entrywise relative accuracy. Numerical examples are presented to demonstrate and confirm our claims.
References
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Bibliographic Information
  • Changli Liu
  • Affiliation: College of Mathematics, Sichuan University, Chengdu 610065, People’s Republic of China
  • Email: chliliu@hotmail.com
  • Jungong Xue
  • Affiliation: School of Mathematical Sciences, Fudan University, Shanghai 200433, People’s Republic of China
  • Email: xuej@fudan.edu.cn
  • Received by editor(s): September 19, 2023
  • Received by editor(s) in revised form: June 20, 2024, and September 2, 2024
  • Published electronically: January 23, 2025
  • Additional Notes: The first author was supported in part by Sichuan Province Natural Science Foundation Grant 2023NSFSC0075. The second author was supported in part by the National Science Foundation of China Grant 12171101, the National Key R&D Program of China 2018YFA0703900 and Laboratory of Mathematics for Nonlinear Science, Fudan University.
    The second author is the corresponding author
  • © Copyright 2025 American Mathematical Society
  • Journal: Math. Comp. 94 (2025), 2367-2408
  • MSC (2020): Primary 15A24, 60J65
  • DOI: https://doi.org/10.1090/mcom/4055