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Stability of the basis property of eigenvalue systems of Sturm-Liouville operators with integral boundary condition

open access: yesElectronic Journal of Differential Equations, 2016
We study a question on stability and instability of the basis property of a system of eigenfunctions of the Sturm - Liouville operator, with an integral perturbation of anti-periodic type on the boundary conditions.
Nurlan S. Imanbaev
doaj  

On the Open TS/ST Correspondence. [PDF]

open access: yesCommun Math Phys
François M, Grassi A.
europepmc   +1 more source

Expansions in Eigenfunctionals

open access: yesIndagationes Mathematicae (Proceedings), 1965
openaire   +2 more sources

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