Sadovnichii, Victor A.; Sultanaev, Yaudat T.; Akhtyamov, Azamat M. On degenerate boundary conditions and finiteness of the spectrum of boundary value problems. (English) Zbl 1496.34054 Parasidis, Ioannis. N. (ed.) et al., Mathematical analysis in interdisciplinary research. Cham: Springer. Springer Optim. Appl. 179, 731-779 (2021). MSC: 34B24 PDFBibTeX XMLCite \textit{V. A. Sadovnichii} et al., Springer Optim. Appl. 179, 731--779 (2021; Zbl 1496.34054) Full Text: DOI
Sadovnichii, V. A.; Sultanaev, Ya. T.; Akhtyamov, A. M. 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). Reviewer: Jiři Lipovský (Hradec Kralove) MSC: 34B45 34L05 PDFBibTeX XMLCite \textit{V. A. Sadovnichii} et al., Differ. Equ. 56, No. 5, 595--604 (2020; Zbl 1446.34045); translation from Differ. Uravn. 56, No. 5, 605--614 (2020) Full Text: DOI
Galatenko, Vladimir V.; Lukashenko, Taras P.; Sadovnichiy, Victor A. 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 PDFBibTeX XMLCite \textit{V. V. Galatenko} et al., in: Modern mathematics and mechanics. Fundamentals, problems and challenges. Cham: Springer. 3--11 (2019; Zbl 1421.42019) Full Text: DOI
Sadovnichii, V. A.; Sultanaev, Ya. T.; Akhtyamov, A. M. 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). Reviewer: Vjacheslav Yurko (Saratov) MSC: 34A55 34B24 47E05 PDFBibTeX XMLCite \textit{V. A. Sadovnichii} et al., Differ. Equ. 55, No. 2, 194--204 (2019; Zbl 1420.34042); translation from Differ. Uravn. 55, No. 2, 192--201 (2019) Full Text: DOI
Sadovnichy, V. A.; Fazullin, Z. Yu.; Nugaeva, I. G. 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 PDFBibTeX XMLCite \textit{V. A. Sadovnichy} et al., Dokl. Math. 98, No. 3, 552--554 (2018; Zbl 1507.47032); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 483, No. 1, 19--21 (2018) Full Text: DOI
Akhtyamov, Azamat Moukhtarovich; Sadovnichiĭ, Viktor Antonovich; Sultanaev, Yaudat Talgatovich Inverse problem for the diffusion operator with symmetric functions and general boundary conditions. (English) Zbl 1463.34056 Eurasian Math. J. 8, No. 1, 10-22 (2017). MSC: 34A55 34B09 34L15 47E05 PDFBibTeX XMLCite \textit{A. M. Akhtyamov} et al., Eurasian Math. J. 8, No. 1, 10--22 (2017; Zbl 1463.34056) Full Text: DOI MNR
Kolesov, A. Yu.; Rozov, N. Kh.; Sadovnichii, V. A. Sufficient condition for the hyperbolicity of mappings of the torus. (English. Russian original) Zbl 1376.37070 Differ. Equ. 53, No. 4, 457-478 (2017); translation from Differ. Uravn. 53, No. 4, 465-486 (2017). MSC: 37D20 37E30 PDFBibTeX XMLCite \textit{A. Yu. Kolesov} et al., Differ. Equ. 53, No. 4, 457--478 (2017; Zbl 1376.37070); translation from Differ. Uravn. 53, No. 4, 465--486 (2017) Full Text: DOI
Galatenko, Vladimir V.; Lukashenko, Taras P.; Sadovnichiy, Victor A. 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 PDFBibTeX XMLCite \textit{V. V. Galatenko} et al., Stud. Syst. Decis. Control 69, 3--11 (2016; Zbl 1364.42031) Full Text: DOI
Chechkina, Aleksandra Grigorievna; Sadovnichy, Viktor Antonovich Degeneration of Steklov-type boundary conditions in one spectral homogenization problem. (English) Zbl 1463.35063 Eurasian Math. J. 6, No. 3, 13-29 (2015). MSC: 35B27 35J25 35P05 35P15 47A10 47A75 49R05 PDFBibTeX XMLCite \textit{A. G. Chechkina} and \textit{V. A. Sadovnichy}, Eurasian Math. J. 6, No. 3, 13--29 (2015; Zbl 1463.35063) Full Text: DOI MNR
Sadovnichii, V. A.; Sultanaev, Ya. T.; Akhtyamov, A. M. 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). Reviewer: Vjacheslav Yurko (Saratov) MSC: 34A55 34B24 47E05 PDFBibTeX XMLCite \textit{V. A. Sadovnichii} et al., Differ. Equ. 51, No. 6, 717--725 (2015; Zbl 1328.34019); translation from Differ. Uravn. 51, No. 6, 706--713 (2015) Full Text: DOI
Sadovnichiĭ, V. A.; Sultanaev, Ya. T.; Akhtyamov, A. M. 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 PDFBibTeX XMLCite \textit{V. A. Sadovnichiĭ} et al., Dokl. Math. 90, No. 3, 715--718 (2014; Zbl 1395.34026); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 459, No. 3, 276--279 (2014) Full Text: DOI
Sadovnichii, V. A.; Sultanaev, Ya. T.; Akhtyamov, A. M. 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). Reviewer: Vjacheslav Yurko (Saratov) MSC: 34A55 34B24 47E05 PDFBibTeX XMLCite \textit{V. A. Sadovnichii} et al., Dokl. Math. 90, No. 2, 565--568 (2014; Zbl 1318.34027); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 458, No. 3, 264--267 (2014) Full Text: DOI