## Found 428 Documents (Results 1–100)

### A singular Sturm-Liouville problem with limit circle endpoint and boundary conditions rationally dependent on the eigenparameter. (English)Zbl 07579521

MSC:  34B24 34L15 34L10
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### Mellin-Barnes representation for $$\mathrm{SL} (2, \mathbb{C} )$$-magnet. (English. Russian original)Zbl 1494.82014

J. Math. Sci., New York 264, No. 3, 286-297 (2022); translation from Zap. Nauchn. Semin. POMI 494, 125-143 (2020).
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### On expansion in eigenfunction for Dirac systems on the unbounded time scales. (English)Zbl 1494.34193

MSC:  34N05 34L10 34L40
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### Indeterminacy estimates and the size of nodal sets in singular spaces. (English)Zbl 1471.49032

MSC:  49Q22 58C40
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### Multiple eigenvalues for the Steklov problem in a domain with a small hole. A functional analytic approach. (English)Zbl 1473.35373

MSC:  35P15 35B25 35J25
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### Sharp endpoint estimates for eigenfunctions restricted to submanifolds of codimension 2. (English)Zbl 1467.58006

MSC:  58C40 42B20
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MSC:  82-XX
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### On the asymptotic behaviour of solutions of the Dirac system and applications to the Sturm-Liouville problem with a singular potential. (English)Zbl 1468.34121

MSC:  34L20 34L40 34B24
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### A Dirichlet spectral problem in domains surrounded by thin stiff and heavy bands. (English)Zbl 1451.35098

Constanda, Christian (ed.), Computational and analytic methods in science and engineering. Selected papers based on the presentations at the 19th international conference on computational and mathematical methods in science and engineering, CMMSE’19, Rota, Spain, June 30 – July 6, 2019. Cham: Birkhäuser. 101-126 (2020).
MSC:  35P15 35B25 35J25
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### WKB asymptotics and spectral deformation in semi-classical limit. (English)Zbl 1439.34063

MSC:  34E20 34L20 81Q20
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### Convergence of spectral decompositions for a singular differential operator with general boundary conditions. (English. Russian original)Zbl 1445.34047

Comput. Math. Model. 30, No. 4, 326-339 (2019); translation from Prikl. Mat. Inf. 61, 16-27 (2019).
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### Spectral properties of differential operators with oscillating coefficients. (English. Russian original)Zbl 1436.34021

Trans. Mosc. Math. Soc. 2019, 153-167 (2019); translation from Tr. Mosk. Mat. O.-va 80, No. 2, 179-195 (2019).
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### The spectral expansion for the Hahn-Dirac system on the whole line. (English)Zbl 1468.34117

MSC:  34L05 34L10 34L40
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### Spectral deformation in a problem of singular perturbation theory. (English. Russian original)Zbl 1417.81133

Dokl. Math. 99, No. 1, 60-63 (2019); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 484, No. 4, 397-400 (2019).
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### A general trace formula for a differential operator on a segment with zero order coefficient perturbed by a finite signed measure. (English. Russian original)Zbl 1455.34088

St. Petersbg. Math. J. 30, No. 3, 411-427 (2019); translation from Algebra Anal. 30, No. 3, 30-54 (2018).
MSC:  34L05 34L10
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### Eigenfunction expansion for singular Sturm-Liouville problems with transmission conditions. (English)Zbl 1406.34101

MSC:  34L10 34B24 47E05
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### Spectral asymptotics for fourth order differential operator with two turning points. (Russian. English summary)Zbl 1463.34355

Ufim. Mat. Zh. 10, No. 4, 24-40 (2018); translation in Ufa Math. J. 10, No. 4, 24-39 (2018).
MSC:  34L20 47E05 34L05
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### Operator function method in the problem of normal waves in an inhomogeneous waveguide. (English. Russian original)Zbl 1414.78010

Differ. Equ. 54, No. 9, 1168-1179 (2018); translation from Differ. Uravn. 54, No. 9, 1196-1206 (2018).
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### Characterization of the $$L^p$$-range of the Poisson transform on the octonionic hyperbolic plane. (English)Zbl 1395.43006

MSC:  43A85 42B20
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### Concentration and universal randomisation of proper subspaces. (Concentration et randomisation universelle de sous-espaces propres.) (French. English summary)Zbl 1378.15021

MSC:  15B52 15A18 60B20
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### The regularized trace formula of the spectrum of a Sturm-Liouville problem with turning point. (English)Zbl 1463.34353

MSC:  34L20 34B24
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### The eigenfunction expansion of singular Sturm-Liouville problem with sign-valued weight. (English)Zbl 1474.34600

MSC:  34L10 34B24
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### Estimates for root functions of a singular second-order differential operator. (English)Zbl 1403.34061

Kalmenov, Tynysbek Sh. (ed.) et al., Functional analysis in interdisciplinary applications, Astana, Kazakhstan, October 2–5, 2017. Cham: Springer (ISBN 978-3-319-67052-2/hbk; 978-3-319-67053-9/ebook). Springer Proceedings in Mathematics & Statistics 216, 245-257 (2017).
MSC:  34L10 47E05
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### Impurity models and products of random matrices. (English)Zbl 1390.82028

Schehr, Grégory (ed.) et al., Stochastic processes and random matrices. Lecture notes of the Les Houches summer school. Volume 104, Les Houches, France, July 6–31, 2015. Oxford: Oxford University Press (ISBN 978-0-19-879731-9/hbk). 474-547 (2017).
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### Rate of convergence for eigenfunctions of Aharonov-Bohm operators with a moving pole. (English)Zbl 1387.35132

Colli, Pierluigi (ed.) et al., Solvability, regularity, and optimal control of boundary value problems for PDEs. In honour of Prof. Gianni Gilardi. Cham: Springer (ISBN 978-3-319-64488-2/hbk; 978-3-319-64489-9/ebook). Springer INdAM Series 22, 1-30 (2017).
MSC:  35J10 35Q40 35J75
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### Diluted banded random matrices: scaling behavior of eigenfunction and spectral properties. (English)Zbl 1381.15030

MSC:  15B52 60B20 15A18
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### Trace of order $$(-1)$$ for a string with singular weight. (English. Russian original)Zbl 1384.34027

Math. Notes 102, No. 2, 164-180 (2017); translation from Mat. Zametki 102, No. 2, 197-215 (2017).
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### On the spectral study of singular Sturm-Liouville problem with sign-valued weight. (English)Zbl 1377.34107

MSC:  34L20 34B24 34L10
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### The phase-integral method in a problem of singular perturbation theory. (English. Russian original)Zbl 1367.34106

Izv. Math. 81, No. 2, 359-390 (2017); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 81, No. 2, 129-160 (2017).
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### Homogenization of spectral problems with singular perturbation of the Steklov condition. (English. Russian original)Zbl 1377.35017

Izv. Math. 81, No. 1, 199-236 (2017); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 81, No. 1, 203-240 (2017).
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### Eigenvalue asymptotics for the Sturm-Liouville operator with potential having a strong local negative singularity. (English)Zbl 1381.34107

MSC:  34L20 34L40
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MSC:  82-XX
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### Solving an initial boundary value problem on the semiinfinite interval. (English)Zbl 1424.15014

MSC:  15A18 34L15 34L20
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### On spectrum and trace formula for one class of singular problems. (English)Zbl 1389.34280

MSC:  34L05 34L20 34B16

### On root functions of fractional Schrödinger operator with singular potential. (Ukrainian. English summary)Zbl 1374.34358

MSC:  34L40 34L10

### Green’s function for the light scattering equations. (English)Zbl 1360.45001

MSC:  45B05 45E05

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### A spectral representation of the linear multivelocity transport problem. (English)Zbl 1348.45005

MSC:  45E10 45C05 45Q05
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### Number of nodal domains and singular points of eigenfunctions of negatively curved surfaces with an isometric involution. (English)Zbl 1335.53048

MSC:  53C21 58J50 30F15
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### Root system of singular perturbations of the harmonic oscillator type operators. (English)Zbl 1330.47023

MSC:  47A55 47A70 34L10
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### Large-scale eigenvector approximation via Hilbert space embedding Nyström. (English)Zbl 1374.68400

MSC:  68T05 15A18
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### Asymptotic expansions for eigenvalues of the Steklov problem in singularly perturbed domains. (English. Russian original)Zbl 1456.35149

St. Petersbg. Math. J. 26, No. 2, 273-318 (2015); translation from Algebra Anal. 26, No. 2, 119-184 (2014).
MSC:  35P20 35J25 35B25
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### Spectral asymptotics for an elliptic operator in a locally periodic perforated domain. (English)Zbl 1319.35122

MSC:  35P05 35B27 35B25
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