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Found 486 Documents (Results 1–100)

Singular solutions to \(k\)-Hessian equations with fast-growing nonlinearities. (English) Zbl 1494.35024

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Completeness and minimality of eigenfunctions and associated functions of ordinary differential operators. (English) Zbl 07523177

de Snoo, H. S. V. (ed.) et al., Contributions to mathematics and statistics. Essays in honor of Seppo Hassi. Vaasa: University of Vaasa, School of Technology and Innovation. Acta Wasaensia 462, 141-151 (2021).
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Spectral theory of dynamical systems. 2nd expanded edition. (English) Zbl 1444.37008

Texts and Readings in Mathematics 15. Singapore: Springer; New Delhi: Hindustan Book Agency (ISBN 978-981-15-6224-2/hbk; 978-981-15-6225-9/ebook). xiii, 223 p. (2020).
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Finite rank perturbations in Pontryagin spaces and a Sturm-Liouville problem with \(\lambda\)-rational boundary conditions. (English) Zbl 1471.47024

Alpay, Daniel (ed.) et al., Indefinite inner product spaces, Schur analysis, and differential equations. A volume dedicated to Heinz Langer. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 263, 163-189 (2018).
MSC:  47B50 34L05 47A55
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Introduction to Hilbert space and the theory of spectral multiplicity. 2nd edition. Reprint of the 1957 edition published by Chelsea Publishing Company. (English) Zbl 1375.46022

Mineola, NY: Dover Publications (ISBN 978-0-486-81733-0). 120 p. (2017).
MSC:  46Cxx 47B15 46-01
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On the index of meromorphic operator-valued functions and some applications. (English) Zbl 1441.47012

Dittrich, Jaroslav (ed.) et al., Functional analysis and operator theory for quantum physics. The Pavel Exner anniversary volume. Dedicated to Pavel Exner on the occasion of his 70th birthday. Zürich: European Mathematical Society (EMS). EMS Ser. Congr. Rep., 95-127 (2017).
MSC:  47A56 47A53 47A68
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Spectral geometry of the Steklov problem. (English) Zbl 1375.49056

Henrot, Antoine (ed.), Shape optimization and spectral theory. Berlin: De Gruyter (ISBN 978-3-11-055085-6/hbk; 978-3-11-055088-7/ebook). 120-148 (2017).
MSC:  49Q10 58J50
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Spectra of generalized Hodge-Laplace operators. The example of flat tori and circular spheres. (Spektren verallgemeinerter Hodge-Laplace-Operatoren. Am Beispiel von flachen Tori und runden Sphären.) (German) Zbl 1387.53003

BestMasters. Wiesbaden: Springer Spektrum (Master Thesis) (ISBN 978-3-658-13109-8/pbk; 978-3-658-13110-4/ebook). vii, 62 p. (2016).
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Gaussian beams on Zoll manifolds and maximally degenerate Laplacians. (English) Zbl 1346.35141

Eskin, Gregory (ed.) et al., Spectral theory and partial differential equations. Conference in honor of James Ralston’s 70th birthday, University of California, Los Angeles, CA, USA, June 17–21, 2013. Proceedings. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-0989-0/pbk; 978-1-4704-2493-0/ebook). Contemporary Mathematics 640, 169-198 (2015).
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On compact perturbation of two-particle Schrödinger operator on a lattice. (English. Russian original) Zbl 1320.81054

Russ. Math. 59, No. 6, 18-22 (2015); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2015, No. 6, 24-30 (2015).
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An abstract theorem in nonlinear analysis. (English) Zbl 1319.35042

de Figueiredo, Djairo G. (ed.) et al., Analysis and topology in nonlinear differential equations. A tribute to Bernhard Ruf on the occasion of his 60th birthday. Selected papers based on the presentations at the IX workshop on nonlinear differential equations, João Pessoa, Brazil, September 2012. Cham: Birkhäuser/Springer (ISBN 978-3-319-04213-8/hbk; 978-3-319-04214-5/ebook). Progress in Nonlinear Differential Equations and Their Applications 85, 301-307 (2014).
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Multiplicity of virtual levels at the lower edge of the continuous spectrum of a two-particle Hamiltonian on a lattice. (English. Russian original) Zbl 1308.81081

Theor. Math. Phys. 180, No. 3, 1040-1050 (2014); translation from Teor. Mat. Fiz. 180, No. 3, 329-341 (2014).
MSC:  81Q05 81Q10
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Another four critical points theorem. (English) Zbl 1441.47075

Akashi, Shigeo (ed.) et al., Proceedings of the seventh international conference on nonlinear analysis and convex analysis (NACA 2011), Busan, South Korea, August 2–5, 2011. Vol. II. Yokohama: Yokohama Publishers. 163-171 (2013).
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