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Found 1,109 Documents (Results 1–100)

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Threshold approximations for the resolvent of a polynomial nonnegative operator pencil. (English. Russian original) Zbl 07491001

St. Petersbg. Math. J. 33, No. 2, 355-385 (2022); translation from Algebra Anal. 33, No. 2, 233-274 (2021).
MSC:  47A10 35B27 47A56
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On lacunas in the spectrum of the Laplacian with the Dirichlet boundary condition in a band with oscillating boundary. (English. Russian original) Zbl 1471.35211

J. Math. Sci., New York 257, No. 3, 273-285 (2021); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 162, 3-14 (2019).
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Pathology of essential spectra of elliptic problems in periodic family of beads threaded by a spoke thinning at infinity. (English) Zbl 1467.35226

MSC:  35P05 35J57
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Asymptotics of eigenvalues in spectral gaps of periodic waveguides with small singular perturbations. (English. Russian original) Zbl 1437.35518

J. Math. Sci., New York 243, No. 5, 746-773 (2019); translation from Zap. Nauchn. Semin. POMI 471, 168-210 (2018).
MSC:  35P20
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Gaps in the spectrum of the Laplacian in a strip with periodic delta interaction. (English. Russian original) Zbl 1430.35169

Proc. Steklov Inst. Math. 305, Suppl. 1, S16-S23 (2019); translation from Tr. Inst. Mat. Mekh. (Ekaterinburg) 24, No. 2, 46-53 (2018).
MSC:  35P05 35J05 81Q10
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Spectral estimates for Schrödinger operators on periodic discrete graphs. (English. Russian original) Zbl 1428.35653

St. Petersbg. Math. J. 30, No. 4, 667-698 (2019); translation from Algebra Anal. 30, No. 4, 61-106 (2018).
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Fourier method for first order differential equations with involution and groups of operators. (Russian. English summary) Zbl 1474.35216

Ufim. Mat. Zh. 10, No. 3, 11-34 (2018); translation in Ufa Math. J. 10, No. 3, 11-34 (2018).
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