Some estimates for the minimal eigenvalue of the Sturm-Liouville problem with third-type boundary conditions. (Q2881209)

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scientific article; zbMATH DE number 6021436
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Some estimates for the minimal eigenvalue of the Sturm-Liouville problem with third-type boundary conditions.
scientific article; zbMATH DE number 6021436

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    3 April 2012
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    Sturm-Liouville problem
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    minimal eigenvalue
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    Some estimates for the minimal eigenvalue of the Sturm-Liouville problem with third-type boundary conditions. (English)
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    The Sturm-Liouville problem NEWLINE\[NEWLINEy''-q(x)y+\lambda y=0, \;y'(0)-k^2y(0)=0, \;y'(1)+k^2y(1)=0NEWLINE\]NEWLINE is considered, where the coefficient \(q\) belongs to a certain class \(A_{\gamma }\). The author proves both upper and lower estimates for the first eigenvalue \(\lambda _1(q)\) of this problem depending on parameters \(k\) and \(\gamma \).
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