Geodesic
Oscillation Properties of a Multipoint Fourth-Order Boundary-Value Problem with Spectral Parameter in the Boundary Condition
Matematičeskie zametki, Tome 106 (2019) no. 6, pp. 854-859

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A multipoint fourth-order boundary-value problem with spectral parameter in the boundary condition is considered. It is proved that its spectrum is simple and the system of derivative eigenfunctions has oscillation properties.
Keywords: oscillation eigenfunction, sign-regular operator, Sobolev space. 
@article{MZM_2019_106_6_a5,
     author = {A. A. Vladimirov and E. S. Karulina},
     title = {Oscillation {Properties} of a {Multipoint} {Fourth-Order} {Boundary-Value} {Problem} with {Spectral} {Parameter} in the {Boundary} {Condition}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {854--859},
     publisher = {mathdoc},
     volume = {106},
     number = {6},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2019_106_6_a5/}
}
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A. A. Vladimirov; E. S. Karulina. Oscillation Properties of a Multipoint Fourth-Order Boundary-Value Problem with Spectral Parameter in the Boundary Condition. Matematičeskie zametki, Tome 106 (2019) no. 6, pp. 854-859. http://geodesic.mathdoc.fr/item/MZM_2019_106_6_a5/