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<p>In this paper, the non-real eigenvalues of the indefinite Sturm-Liouville problem with coupled boundary conditions are studied. The lower bound for non-real eigenvalues is derived by applying the spectral theory of self-adjoint operators in Krein space.</p>

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The Lower Bounds Estimates for Non-real Eigenvalues of Indefinite Sturm-Liouville Problem with Coupled Boundary Conditions

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • Jinming Cai,
  • Jinbang Feng,
  • Kun Li,
  • Zhaowen Zheng

摘要

In this paper, the non-real eigenvalues of the indefinite Sturm-Liouville problem with coupled boundary conditions are studied. The lower bound for non-real eigenvalues is derived by applying the spectral theory of self-adjoint operators in Krein space.