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Found 1,018 Documents (Results 1–100)

On asymptotics of the spectrum of an integral operator with a logarithmic kernel of a special form. (English. Russian original) Zbl 07810127

Differ. Equ. 59, No. 12, 1721-1733 (2023); translation from Differ. Uravn. 59, No. 12, 1680-1691 (2023).
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Spectral estimates for the fourth-order differential operator with periodic coefficients. (English. Russian original) Zbl 07659026

Russ. Math. 66, No. 7, 76-81 (2022); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2022, No. 7, 86-92 (2022).
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Averaging for high-frequency normal system of ordinary differential equations with multipoint boundary value problems. (Russian. English summary) Zbl 1513.34167

Vladikavkaz. Mat. Zh. 24, No. 2, 62-74 (2022); translation in Sib. Math. J. 64, No. 3, 737-746 (2023).
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Weighted string equation where the weight is a noncompact multiplier: continuous spectrum and eigenvalues. (English. Russian original) Zbl 1506.34108

St. Petersbg. Math. J. 33, No. 4, 697-709 (2022); translation from Algebra Anal. 33, No. 4, 155-172 (2021).
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On the asymptotics of the nonreal spectrum of the integro-differential Gurtin-Pipkin equation with relaxation kernels representable in the form of the Stielties integral. (English. Russian original) Zbl 1490.45013

Differ. Equ. 58, No. 2, 242-255 (2022); translation from Differ. Uravn. 58, No. 2, 238-251 (2022).
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Eigenvalue estimates and asymptotics for weighted pseudodifferential operators with singular measures in the critical case. (English) Zbl 1515.47024

Exner, Pavel (ed.) et al., Partial differential equations, spectral theory, and mathematical physics. The Ari Laptev anniversary volume. Berlin: European Mathematical Society (EMS). EMS Ser. Congr. Rep., 331-354 (2021).
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On approximate solutions of nonlinear boundary-value problems by the Newton-Kantorovich method. (English. Russian original) Zbl 1487.34071

J. Math. Sci., New York 258, No. 5, 594-617 (2021); translation from Neliniĭni Kolyvannya 23, No. 2, 162-183 (2020).
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Asymptotic behavior of large eigenvalues of the two-photon Rabi model. (English) Zbl 1471.81118

Albeverio, Sergio (ed.) et al., Schrödinger operators, spectral analysis and number theory. In memory of Erik Balslev. Cham: Springer. Springer Proc. Math. Stat. 348, 89-115 (2021).
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Infinite number of eigenvalues of \(2\times 2\) operator matrices: asymptotic discrete spectrum. (English. Russian original) Zbl 1458.81023

Theor. Math. Phys. 205, No. 3, 1564-1584 (2020); translation from Teor. Mat. Fiz. 205, No. 3, 368-390 (2020).
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