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Found 241 Documents (Results 1–100)

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Left-right essential spectra of one-sided operator matrix and application. (English) Zbl 07361677

Jeribi, Aref (ed.), Operator theory. Proceedings of the international conference on operator theory, Hammamet, Tunisia, April 30 – May 3, 2018. Berlin: De Gruyter. De Gruyter Proc. Math., 157-175 (2021).
MSC:  47A10 47A53 34K08
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Invariance of essential spectrum by means of generalized weak demicompactness. (English) Zbl 07361673

Jeribi, Aref (ed.), Operator theory. Proceedings of the international conference on operator theory, Hammamet, Tunisia, April 30 – May 3, 2018. Berlin: De Gruyter. De Gruyter Proc. Math., 115-120 (2021).
MSC:  47A53 47A10
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Asymptotics of the eigenvalues and eigenfunctions of a thin square Dirichlet lattice with a curved ligament. (English. Russian original) Zbl 1419.35144

Math. Notes 105, No. 4, 559-579 (2019); translation from Mat. Zametki 105, No. 4, 564-588 (2019).
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Spectrum of weighted composition operators. III: Essential spectra of some disjointness preserving operators on Banach lattices. (English) Zbl 1411.47007

de Jeu, Marcel (ed.) et al., Ordered structures and applications. Positivity VII (Zaanen centennial conference), Leiden, the Netherlands, July 22–26, 2013. Basel: Birkhäuser/Springer. Trends Math., 233-261 (2016).
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An eigenvalue multiplicity formula for the Schur complement of a \(3\times3\) block operator matrix. (English. Russian original) Zbl 1323.47010

Sib. Math. J. 56, No. 4, 699-713 (2015); translation from Sib. Mat. Zh. 56, No. 4, 878-895 (2015).
MSC:  47A56 81Q10
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A characterization of compact pseudo-differential operators on \(\mathbb S^1\). (English) Zbl 1260.47050

Rodino, Luigi (ed.) et al., Pseudo-differential operators: analysis, applications and computations. Selected papers based on lectures presented at the meeting of the ISAAC Group in Pseudo-Differential Operators (IGPDO), London, UK, July 13–18, 2009. Basel: Birkhäuser (ISBN 978-3-0348-0048-8/hbk; 978-3-0348-0049-5/ebook). Operator Theory: Advances and Applications 213, 25-29 (2011).
MSC:  47G30
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Spectral theory of pseudo-differential operators on \(\mathbb S^{1}\). (English) Zbl 1260.47051

Rodino, Luigi (ed.) et al., Pseudo-differential operators: analysis, applications and computations. Selected papers based on lectures presented at the meeting of the ISAAC Group in Pseudo-Differential Operators (IGPDO), London, UK, July 13–18, 2009. Basel: Birkhäuser (ISBN 978-3-0348-0048-8/hbk; 978-3-0348-0049-5/ebook). Operator Theory: Advances and Applications 213, 15-23 (2011).
MSC:  47G30 46E35
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Localization near the corner point of the principal eigenfunction of the Dirichlet problem in a domain with thin edging. (English. Russian original) Zbl 1221.35257

Sib. Math. J. 52, No. 2, 274-290 (2011); translation from Sib. Mat. Zh. 52, No. 2, 350-370 (2011).
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