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A universal Birkhoff pseudospectral method for solving boundary value problems

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  • Ross, I.M.
  • Proulx, R.J.
  • Borges, C.F.

Abstract

Inspired by the well-conditioned spectral collocation method of Wang et al., a new Birkhoff pseudospectral method for solving boundary value problems is proposed. More specifically, we develop new Birkhoff interpolants that jointly satisfy boundary conditions on both the derivatives and values of the dependent variable. This key design criterion obviates the need to generate different Birkhoff matrices for different boundary conditions while maintaining the O(1) condition number with respect to N, where, N2 is the size of the Birkhoff matrix. In addressing the resulting theoretical and numerical problems, we generate computationally efficient and stable formulas for producing the new Birkhoff matrices. Furthermore, by transforming a generic mth order differential equation to its canonical form, we show that the same first-order Birkhoff matrix can be repeatedly used to solve a wide variety of boundary value problems. Illustrative numerical examples demonstrate the generality, simplicity and utility of the new approach.

Suggested Citation

  • Ross, I.M. & Proulx, R.J. & Borges, C.F., 2023. "A universal Birkhoff pseudospectral method for solving boundary value problems," Applied Mathematics and Computation, Elsevier, vol. 454(C).
    • Handle: RePEc:eee:apmaco:v:454:y:2023:i:c:s0096300323002709
    DOI: 10.1016/j.amc.2023.128101
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    References listed on IDEAS

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    1. Ramos, Higinio & Singh, Gurjinder, 2022. "Solving second order two-point boundary value problems accurately by a third derivative hybrid block integrator," Applied Mathematics and Computation, Elsevier, vol. 421(C).
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    Cited by:

    1. Rufai, Mufutau Ajani & Carpentieri, Bruno & Ramos, Higinio, 2024. "An efficient fifth-order block method for solving third-order BVPs," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 223(C), pages 307-321.

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    3. Mufutau Ajani Rufai, 2022. "An Efficient Third-Derivative Hybrid Block Method for the Solution of Second-Order BVPs," Mathematics, MDPI, vol. 10(19), pages 1-15, October.

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