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Found 12 Documents (Results 1–12)

Degenerate boundary conditions for the diffusion operator on a geometric graph. (English. Russian original) Zbl 1446.34045

Differ. Equ. 56, No. 5, 595-604 (2020); translation from Differ. Uravn. 56, No. 5, 605-614 (2020).
MSC:  34B45 34L05
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Convergence almost everywhere of orthorecursive expansions in systems of translates and dilates. (English) Zbl 1421.42019

Sadovnichiy, Victor A. (ed.) et al., Modern mathematics and mechanics. Fundamentals, problems and challenges. Cham: Springer. Underst. Complex Syst., 3-11 (2019).
MSC:  42C20 41A60
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Inverse Sturm-Liouville problem with nonseparated boundary conditions on a geometric graph. (English. Russian original) Zbl 1420.34042

Differ. Equ. 55, No. 2, 194-204 (2019); translation from Differ. Uravn. 55, No. 2, 192-201 (2019).
MSC:  34A55 34B24 47E05
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The spectrum and trace formula for bounded perturbations of differential operators. (English. Russian original) Zbl 1507.47032

Dokl. Math. 98, No. 3, 552-554 (2018); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 483, No. 1, 19-21 (2018).
MSC:  47A55 47A10 47F05
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Convergence almost everywhere of orthorecursive expansions in functional systems. (English) Zbl 1364.42031

Sadovnichiy, Victor A. (ed.) et al., Advances in dynamical systems and control. Cham: Springer (ISBN 978-3-319-40672-5/hbk; 978-3-319-40673-2/ebook). Studies in Systems, Decision and Control 69, 3-11 (2016).
MSC:  42C05
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Solvability theorems for an inverse nonself-adjoint Sturm-Liouville problem with nonseparated boundary conditions. (English. Russian original) Zbl 1328.34019

Differ. Equ. 51, No. 6, 717-725 (2015); translation from Differ. Uravn. 51, No. 6, 706-713 (2015).
MSC:  34A55 34B24 47E05
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A generalization of Levinson’s uniqueness theorem to the case of general boundary conditions. (English. Russian original) Zbl 1395.34026

Dokl. Math. 90, No. 3, 715-718 (2014); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 459, No. 3, 276-279 (2014).
MSC:  34A55 34B24
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A generalization of Borg’s uniqueness theorems for a symmetric potential to general boundary conditions. (English. Russian original) Zbl 1318.34027

Dokl. Math. 90, No. 2, 565-568 (2014); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 458, No. 3, 264-267 (2014).
MSC:  34A55 34B24 47E05
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