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A posteriori verification of the positivity of solutions to elliptic boundary value problems

Author

Listed:
  • Kazuaki Tanaka

    (Waseda University)

  • Taisei Asai

    (Waseda University)

Abstract

The purpose of this paper is to develop a unified a posteriori method for verifying the positivity of solutions of elliptic boundary value problems by assuming neither $$H^2$$ H 2 -regularity nor $$ L^{\infty } $$ L ∞ -error estimation, but only $$ H^1_0 $$ H 0 1 -error estimation. In (J Comput Appl Math 370:112647, 2020), we proposed two approaches to verify the positivity of solutions of several semilinear elliptic boundary value problems. However, some cases require $$ L^{\infty } $$ L ∞ -error estimation and, therefore, narrow applicability. In this paper, we extend one of the approaches and combine it with a priori error bounds for Laplacian eigenvalues to obtain a unified method that has wide application. We describe how to evaluate some constants required to verify the positivity of desired solutions. We apply our method to several problems, including those to which the previous method is not applicable.

Suggested Citation

  • Kazuaki Tanaka & Taisei Asai, 2022. "A posteriori verification of the positivity of solutions to elliptic boundary value problems," Partial Differential Equations and Applications, Springer, vol. 3(1), pages 1-25, February.
    • Handle: RePEc:spr:pardea:v:3:y:2022:i:1:d:10.1007_s42985-021-00143-2
    DOI: 10.1007/s42985-021-00143-2
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    References listed on IDEAS

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    1. Liu, Xuefeng, 2015. "A framework of verified eigenvalue bounds for self-adjoint differential operators," Applied Mathematics and Computation, Elsevier, vol. 267(C), pages 341-355.
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