Order results by:
| Issue | Title | |
| Vol 6, No 1 (2015) | On the Robin eigenvalues of the Laplacian in the exterior of a convex polygon | Abstract PDF (Eng) similar documents |
| K. Pankrashkin | ||
| "... constant , let H denote the Laplacian in , u 7! u, with the Robin boundary conditions @u=@ = u ..." | ||
| Vol 15, No 5 (2024) | Eccentricity Laplacian energy of a graph | Abstract PDF (Eng) similar documents |
| A. Harshitha, S. Nayak, S. D’Souza | ||
| "... are the eigenvalues of the eccentricity Laplacian matrix, then the eccentricity Laplacian energy of G is ELE(G) = Xn i ..." | ||
| Vol 13, No 2 (2022) | On the discrete spectrum of a quantum waveguide with Neumann windows in presence of exterior field | Abstract PDF (Eng) similar documents |
| A. S. Bagmutov, H. . Najar, I. F. Melikhov, I. Y. Popov | ||
| "... that such system has eigenvalues below the lower bound of the essential spectrum for any F ≥ 0. Then we closer ..." | ||
| Vol 13, No 1 (2022) | A model of sheared nanoribbons | Abstract PDF (Eng) similar documents |
| Ph. Briet | ||
| "... In this note, we investigate the spectral properties of the Dirichlet Laplacian defined ..." | ||
| Vol 7, No 2 (2016): Special Issue | Laplacians with singular perturbations supported on hypersurfaces | Abstract PDF (Eng) similar documents |
| A. Mantile, A. Posilicano | ||
| "... self-adjoint realizations of the n-dimensional Laplacian with linear boundary conditions ..." | ||
| Vol 9, No 2 (2018) | Approximation of eigenvalues of Schrodinger operators¨ | Abstract PDF (Eng) similar documents |
| J. F. Brasche, R. Fulsche | ||
| "... . An algorithm for the numerical computation of eigenvalues of generalized Schrodinger operators in¨ L2(R ..." | ||
| Vol 8, No 2 (2017) | Quasi-semidefinite eigenvalue problem and applications | Abstract PDF (Eng) similar documents |
| L. Grubisic, J. Tambaca | ||
| "... In this note, we study the eigenvalue problem for a class of block operator matrix pairs. Our ..." | ||
| Vol 12, No 6 (2021) | Monotonicity of the eigenvalues of the two-particle Schrӧdinger operator on a lattice | Abstract PDF (Eng) similar documents |
| J. I. Abdullaev, A. M. Khalkhuzhaev, L. S. Usmonov | ||
| "... on the three-dimensional lattice Z3. It is proved that the number N(k) ≡ N(k(1),k(2),k(3)) of eigenvalues below ..." | ||
| Vol 9, No 2 (2018) | N wells at a circle. Splitting of lower eigenvalues | Abstract PDF (Eng) similar documents |
| T. F. Pankratova | ||
| Vol 12, No 5 (2021) | Bound states for Laplacian perturbed by varying potential supportedby line in R3 | Abstract PDF (Eng) similar documents |
| A. S. Bagmutov | ||
| Vol 14, No 2 (2023) | Existence of the eigenvalues of a tensor sum of the Friedrichs models with rank 2 per turbation | Abstract PDF (Eng) similar documents |
| T. H. Rasulov, B. I. Bahronov | ||
| "... lattice. We investigate the number and location of the eigenvalues of Hμ,λ. The existence of eigenvalues ..." | ||
| Vol 14, No 3 (2023) | On eigenvalues and virtual levels of a two-particle Hamiltonian on a d-dimensional lattice | Abstract PDF (Eng) similar documents |
| M. I. Muminov, A. M. Khurramov, I. N. Bozorov | ||
| "... . The existence conditions of eigenvalues and virtual levels of h_(k); are investigated in detail with respect ..." | ||
| Vol 15, No 1 (2024) | Graph spectral analysis of nonane isomers | Abstract PDF (Eng) similar documents |
| B. I. Andrew, A. Anuradha | ||
| "... parameters of all isomers of nonane C9H20 have been computed and its relationship with its eigenvalue-based ..." | ||
| Vol 14, No 4 (2023) | Irreducible characters of the icosahedral group | Abstract PDF (Eng) similar documents |
| S. Kanemitsu, J. Mehta, Y. Sun | ||
| Vol 11, No 3 (2020) | Approximate analytical method for finding eigenvalues of Sturm-Liouville problem with generalized boundary condition of the third kind | Abstract PDF (Eng) similar documents |
| V. D. Lukyanov, D. A. Bulekbaev, A. V. Morozov, L. V. Nosova | ||
| "... combination are polynomials of the boundary problem eigenvalue. A method of approximate analytical calculation ..." | ||
| Vol 9, No 2 (2018) | Level crossings of eigenvalues of the Schrodinger Hamiltonian of the isotropic harmonic¨ oscillator perturbed by a central point interaction in different dimensions | Abstract PDF (Eng) similar documents |
| S. Fassari, M. Gadella, M. L. Glasser, L. M. Nieto, F. matfa62@gmail.com | ||
| "... In this brief presentation, some striking differences between level crossings of eigenvalues ..." | ||
| Vol 14, No 5 (2023) | On the spectrum of the two-particle Schrödinger operator with point potential: one dimensional case | Abstract PDF (Eng) similar documents |
| U. N. Kuljanov | ||
| "... of unique negative eigenvalue of the Schr¨odinger operator is proved. Further, this eigenvalue ..." | ||
| Vol 14, No 5 (2023) | On the discrete spectrum of the Schrödinger operator using the 2+1 fermionic trimer on the lattice | Abstract PDF (Eng) similar documents |
| A. M. Khalkhuzhaev, I. A. Khujamiyorov | ||
| "... ), then the operator H; (0) has no eigenvalues. If 2 ( 1; 2), then the operator H; (0) has a unique eigenvalue ..." | ||
| Vol 13, No 3 (2022) | Conditions for the existence of bound states of a two-particle Hamiltonian on a three-dimensional lattice | Abstract PDF (Eng) similar documents |
| M. I. Muminov, A. M. Khurramov, I. N. Bozorov | ||
| "... interacting via some attractive potential is considered. Conditions for the existence of eigenvalues ..." | ||
| Vol 14, No 3 (2023) | The first Schur complement for a lattice spin-boson model with at most two photons | Abstract PDF (Eng) similar documents |
| T. Rasulov, E. Dilmurodov | ||
| "... properties of S1(_) related to the number of eigenvalues of A2 for all dimensions d of the torus Td ..." | ||
| Vol 10, No 2 (2019) | Numerical solution for the Schrodinger equation with potential in graphene structures | Abstract PDF (Eng) similar documents |
| L. A. Nhat | ||
| "... This paper presents a different numerical solution to compute eigenvalues of the Schrodinger ..." | ||
| Vol 7, No 5 (2016) | On direct and inverse spectral problems for sloshing of a two-layer fluid in an open container | Abstract PDF (Eng) similar documents |
| N. G. Kuznetsov | ||
| "... We study the direct and inverse eigenvalue problems for a pair of harmonic functions ..." | ||
| Vol 12, No 4 (2021) | Dirac operator with different potentials on edges of quantum graph: resonance asymptotics | Abstract PDF (Eng) similar documents |
| A. G. Belolipetskaia, I. Y. Popov | ||
| "... for a quantum graph that consists of a compact interior and a finite number of exterior edges of infinite length ..." | ||
| Vol 10, No 6 (2019) | Threshold analysis for a family of 2 × 2 operator matrices | Abstract PDF (Eng) similar documents |
| T. H. Rasulov, E. B. Dilmurodov | ||
| "... )) ( or z = 27/2 = max/k∈T3 σess(Aµ(k)) is a threshold eigenvalue or a virtual level of Aµ(k(i)) for some k ..." | ||
| Vol 14, No 5 (2023) | Boundary value problem for a degenerate equation with a Riemann–Liouville operator | Abstract PDF (Eng) similar documents |
| B. Yu. Irgashev | ||
| Vol 8, No 3 (2017) | Finiteness of discrete spectrum of the two-particle Schrodinger operator on diamond lattices | Abstract PDF (Eng) similar documents |
| M. I. Muminov | ||
| "... a sufficiency condition of finiteness for discrete spectrum eigenvalues of H. ..." | ||
| Vol 12, No 2 (2021) | Non-compact perturbations of the spectrum of multipliers given with functions | Abstract PDF (Eng) similar documents |
| R. R. Kucharov, R. R. Khamraeva | ||
| "... . Precise description of the essential spectrum and the existence of simple eigenvalue is received. We prove ..." | ||
| Vol 15, No 6 (2024) | Boundary composed of small Helmholtz resonators: asymptotic approach | Abstract PDF (Eng) similar documents |
| I. Y. Popov, E. S. Trifanova, A. S. Bagmutov, A. A. Lytaev | ||
| "... the number of attached small resonators to infinity, we obtain a problem for the Laplacian in the main square ..." | ||
| Vol 8, No 2 (2017) | Waveguides with fast oscillating boundary | Abstract PDF (Eng) similar documents |
| G. Cardone | ||
| "... impose Dirichlet, Neumann or Robin boundary conditions assuming that both the period and the amplitude ..." | ||
| Vol 13, No 3 (2022) | Ladder operators approach to representation classi cation problem for Jordan-Schwinger image of su(2) algebra | Abstract PDF (Eng) similar documents |
| G. V. Tushavin, E. V. Zaitseva, A. I. Trifanov | ||
| "... The eigenvalues of the complete commuting set of self-adjoint operators determine the classi ..." | ||
| Vol 12, No 4 (2021) | On Sombor energy of graphs | Abstract PDF (Eng) similar documents |
| K. J. Gowtham, Narahari Narasimha Swamy | ||
| "... = 0.976. Further, we found some bounds and characterizations on the largest eigenvalue of S(G ..." | ||
| Vol 15, No 3 (2024) | Energy and spectral radius of Zagreb matrix of graph with applications | Abstract PDF (Eng) similar documents |
| Sh. S. Shetty, K. A. Bhat | ||
| "... vertex, if the corresponding vertices are adjacent in Γ, and zero otherwise. The Zagreb eigenvalues of Γ ..." | ||
| Vol 6, No 2 (2015) | Universality of the discrete spectrum asymptotics of the three-particle Schrödinger operator on a lattice | Abstract PDF (Eng) similar documents |
| M. I. Muminov, T. H. Rasulov | ||
| "... the operator H(K) has infinitely many negative eigenvalues accumulating at zero. It is found that for every K ..." | ||
| Vol 13, No 3 (2022) | Spectral gaps for star-like quantum graph and for two coupled rings | Abstract PDF (Eng) similar documents |
| I. V. Blinova, A. I. Popov, A. A. Bosova | ||
| "... the second and the rst eigenvalues of the free Schro¨ dinger operator, is studied. The dependence of the gap ..." | ||
| Vol 15, No 4 (2024) | The point spectrum of the three-particle Schr ¨odinger operator for a system comprising two identical bosons and one fermion on Z. | Abstract PDF (Eng) similar documents |
| Z. I. Muminov, V. U. Aktamova | ||
| "... which possesses infinitely many eigenvalues depending on repulsive or attractive interactions, under ..." | ||
| Vol 7, No 5 (2016) | Spectral properties of a two–particle hamiltonian on a d-dimensional lattice | Abstract PDF (Eng) similar documents |
| M. I. Muminov, A. M. Khurramov | ||
| "... attractive potential is considered. The number of eigenvalues of the family h(k) is studied depending ..." | ||
| Vol 6, No 2 (2015) | An introduction to the spectral asymptotics of a damped wave equation on metric graphs | Abstract PDF (Eng) similar documents |
| J. Lipovsk´y | ||
| "... equation. We define the notion of a high frequency abscissa, a sequence of eigenvalues with imaginary parts ..." | ||
| Vol 8, No 2 (2017) | The behaviour of the three-dimensional Hamiltonian −∆ + λ [δ(x + x0) + δ(x − x0)] as the distance between the two centres vanishes | Abstract PDF (Eng) similar documents |
| S. Albeverio, S. Fassari, F. Rinaldi | ||
| "... in the norm resolvent sense to that of the negative three-dimensional Laplacian perturbed by a single ..." | ||
| Vol 11, No 2 (2020) | Analysis of the spectrum of a 2×2 operator matrix. Discrete spectrum asymptotics | Abstract PDF (Eng) similar documents |
| T. H. Rasulov, E. B. Dilmurodov | ||
| "... of the coupling constant µ we establish the existence of infinitely many eigenvalues, which are located ..." | ||
| Vol 9, No 2 (2018) | Cyclic-periodic ZRP structures. Scattering problem for generalized Bloch functions and conductivity | Abstract PDF (Eng) similar documents |
| S. Leble | ||
| "... Hamiltonian with a system of a nanostructure ZRPs is found from the matrix eigenvalue problem. The scattering ..." | ||
| 1 - 43 of 43 Items | ||
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