The number of Dirac-weighted eigenvalues of Sturm-Liouville equations with integrable potentials and an application to inverse problems
The number of Dirac-weighted eigenvalues of Sturm-Liouville equations with integrable potentials and an application to inverse problems
复制标题
具有可积势的 Sturm-Liouville 方程的狄拉克加权特征值的数量及其在反演问题中的应用
DOI:
10.1002/mma.7547
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发表时间:
2021-01
期刊:
影响因子:
--
通讯作者:
綦建刚
中科院分区:
文献类型:
--
作者:
陈潇;綦建刚
In this paper, we further Meirong Zhang, et al.'s work by computing the number of weighted eigenvalues for Sturm-Liouville equations, equipped with general integrable potentials and Dirac weights, under Dirichlet boundary condition. We show that, for a Sturm-Liouville equation with a general integrable potential, if its weight is a positive linear combination of $n$ Dirac Delta functions, then it has at most $n$ (may be less than $n$, or even be $0$) distinct real Dirichlet eigenvalues, or every complex number is a Dirichlet eigenvalue; in particular, under some sharp condition, the number of Dirichlet eigenvalues is exactly $n$. Our main method is to introduce the concepts of characteristics matrix and characteristics polynomial for Sturm-Liouville problem with Dirac weights, and put forward a general and direct algorithm used for computing eigenvalues. As an application, a class of inverse Dirichelt problems for Sturm-Liouville equations involving single Dirac distribution weights is studied.
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影响因子:
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作者:
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DOI:
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期刊:
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DOI:
10.1016/b978-0-12-384654-9.00008-6
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影响因子:
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