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Found 256 Documents (Results 1–100)

Perspectives on general left-definite theory. (English) Zbl 1496.47040

Gesztesy, Fritz (ed.) et al., From operator theory to orthogonal polynomials, combinatorics, and number theory. A volume in honor of Lance Littlejohn’s 70th birthday. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 285, 69-89 (2021).
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Singular perturbations of unbounded selfadjoint operators. Reverse approach. (English) Zbl 1481.47034

Kurasov, Pavel (ed.) et al., Analysis as a tool in mathematical physics. In memory of Boris Pavlov. Collected papers presented at the conferences “Spectral Theory and Applications”, Stockholm, Sweden, March 13–15, 2016 and “Operator Theory, Analysis and Mathematical Physics – OTAMP2016”, Euler International Mathematical Institute, St. Petersburg, Russia, August 2–7, 2016. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 276, 63-79 (2020).
MSC:  47B25 47F05 47A55
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Uniform asymptotic solution in the form of an Airy function for semiclassical bound states in one-dimensional and radially symmetric problems. (English. Russian original) Zbl 1441.81091

Theor. Math. Phys. 201, No. 3, 1742-1770 (2019); translation from Teor. Mat. Fiz. 201, No. 3, 382-414 (2019).
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Preservation of the unconditional basis property under non-self-adjoint perturbations of self-adjoint operators. (English. Russian original) Zbl 1436.46012

Funct. Anal. Appl. 53, No. 3, 192-204 (2019); translation from Funkts. Anal. Prilozh. 53, No. 3, 45-60 (2019).
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The Lippmann-Schwinger formula and one dimensional models with Dirac delta interactions. (English) Zbl 1425.81092

Kuru, Şengül (ed.) et al., Integrability, supersymmetry and coherent states. A volume in honour of Professor Véronique Hussin. In part selected contributions from the 6th international workshop on new challenges in quantum mechanics: integrability and supersymmetry, Valladolid, Spain, June 27–30, 2017. Cham: Springer. CRM Ser. Math. Phys., 309-322 (2019).
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Homogeneous rank one perturbations and inverse square potentials. (English) Zbl 1482.81016

Kielanowski, Piotr (ed.) et al., Geometric methods in physics XXXVI. Workshop and summer school, Białowieża, Poland, July 2–8, 2017. Selected papers of the 36th workshop (WGMPXXXVI) and extended abstracts of lectures given at the 6th “School of geometry and physics”. Cham: Birkhäuser. Trends Math., 253-264 (2019).
MSC:  81Q10 81Q15 47A55
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Extended states for the Schrödinger operator with quasi-periodic potential in dimension two. (English) Zbl 1442.35003

Memoirs of the American Mathematical Society 1239. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-3543-1/pbk; 978-1-4704-5069-4/ebook). v, 139 p. (2019).
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Semiclassical asymptotics of the spectrum near the lower boundary of spectral clusters for a Hartree-type operator. (English. Russian original) Zbl 1371.81116

Math. Notes 101, No. 6, 1009-1022 (2017); translation from Mat. Zametki 101, No. 6, 894-910 (2017).
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A new proof of the Helton-Howe-Carey-Pincus trace formula. (English) Zbl 1439.47016

Kielanowski, Piotr (ed.) et al., Geometric methods in physics. XXXIV workshop, Białowieża, Poland, June 28 – July 4, 2015. Basel: Birkhäuser/Springer. Trends Math., 57-68 (2016).
MSC:  47B20 47A55 81Q10
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The method of rigged spaces in singular perturbation theory of self-adjoint operators. (English) Zbl 1447.47010

Operator Theory: Advances and Applications 253. Basel: Birkhäuser/Springer (ISBN 978-3-319-29533-6/hbk; 978-3-319-29535-0/ebook). xx, 237 p. (2016).
MSC:  47-02 47A55 47B25
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Locally definitizable operators: the local structure of the spectrum. (English) Zbl 1422.47046

Alpay, Daniel (ed.), Operator theory. With 51 figures and 2 tables. In 2 volumes. Springer Reference. Basel: Springer. 241-259 (2015).
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Perturbation of a periodic operator by a narrow potential. (English. Russian original) Zbl 1280.81055

Theor. Math. Phys. 173, No. 1, 1438-1444 (2012); translation from Teor. Mat. Fiz. 173, No. 1, 127-134 (2012).
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Localization and de-localization in disordered systems. (English) Zbl 1341.82044

Subrahmanyam, P. V. (ed.) et al., Proceedings of the national symposium on mathematical methods and applications, NSMMA, Chennai, India, December 22, 2010. Invited talks. Chennai: Indian Institute of Technology Madras. 24-36 (2011).
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Large coupling convergence: overview and new results. (English) Zbl 1264.47006

Demuth, Michael (ed.) et al., Partial differential equations and spectral theory. Basel: Birkhäuser (ISBN 978-3-0348-0023-5/hbk; 978-3-0348-0024-2/ebook). Operator Theory: Advances and Applications 211. Advances in Partial Differential Equations, 73-117 (2011).
MSC:  47A07 47A05 47B25
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Topics in spectral theory. (English) Zbl 1119.47006

Attal, Stéphane (ed.) et al., Open quantum systems I. The Hamiltonian approach. Lecture notes of the summer school, Grenoble, France June 16th – July 4th 2003. Berlin: Springer (ISBN 3-540-30991-8/pbk). Lecture Notes in Mathematics 1880, 235-316 (2006).
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Jacobi matrices associated with the inverse eigenvalue problem in the theory of singular perturbations of self-adjoint operators. (Ukrainian, English) Zbl 1118.47008

Ukr. Mat. Zh. 58, No. 12, 1651-1662 (2006); translation in Ukr. Math. J. 58, No. 12, 1876-1890 (2006).
MSC:  47A55 47B25 47A75
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Lagrangian tori and spectra for non-selfadjoint operators (based on joint works with J. Sjöstrand and S. Vũ Ngọc). (English) Zbl 1122.35088

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Renormalization of exponential sums and matrix cocycles. (English) Zbl 1292.34049

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Nonselfadjoint perturbations of selfadjoint operators in two dimensions: II. Vanishing averages. (English) Zbl 1096.47053

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Green’s function estimates for lattice Schrödinger operators and applications. (English) Zbl 1137.35001

Annals of Mathematics Studies 158. Princeton, NJ: Princeton University Press (ISBN 0-691-12098-6/pbk; 0-691-12097-8/hbk). x, 173 p. (2005).
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