Order results by:
| Issue | Title | |
| 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 | ||
| "... In the paper we consider a tensor sum Hμ,λ,μ,λ > 0 of two Friedrichs models hμ,λ with rank two ..." | ||
| Vol 3, No 6 (2012) | On infinite number of negative eigenvalues of the Friedrichs model | Abstract similar documents |
| Yu. Kh. Eshkabilov | ||
| "... Изучен дискретный спектр самосопряженных операторов в модели Фридрихса с положительным ..." | ||
| Vol 16, No 5 (2025) | Asymptotic expansion of Fredholm determinant associated to a family of Friedrichs models arising in quantum mechanics | Abstract PDF (Eng) similar documents |
| T. Rasulov, G. Umirkulova | ||
| "... In this paper, we consider a family of Friedrichs models that arise in quantum mechanics ..." | ||
| Vol 5, No 5 (2014) | On the number of eigenvalues of the family of operator matrices | Abstract PDF (Eng) similar documents |
| M. I. Muminov, T. H. Rasulov | ||
| "... to establish the existence of infinitely many eigenvalues of H(K) for all K ∈ Λ when the associated Friedrichs ..." | ||
| 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 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 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 | ||
| "... at @ , where is the outer unit normal. We show that, for any fixed m 2 N, the mth eigenvalue E m ( ) of H ..." | ||
| 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 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 4, No 6 (2013) | Weyl function for sum of operators tensor products | Abstract PDF (Eng) similar documents |
| A. A. Boitsev, H. Neidhardt, I. Yu. Popov | ||
| Vol 6, No 1 (2015) | Tunneling in multidimensional wells | Abstract PDF (Eng) similar documents |
| T. F. Pankratova | ||
| "... A full asymptotic series for low eigenvalues and eigenfunctions of a stationary Schr¨odinger ..." | ||
| Vol 4, No 4 (2013): Special Issue. INTERNATIONAL CONFERENCE "MATHEMATICAL CHALLENGE OF QUANTUM TRANSPORT IN NANOSYSTEMS - 2013. PIERRE DUCLOS WORKSHOP" | Negative eigenvalues of the Y-type chain of weakly coupled ball resonators | Abstract PDF (Eng) similar documents |
| A. S. Anikevich | ||
| "... at most one negative eigenvalue in the case of δ-coupling in contact points. ..." | ||
| Vol 4, No 4 (2013): Special Issue. INTERNATIONAL CONFERENCE "MATHEMATICAL CHALLENGE OF QUANTUM TRANSPORT IN NANOSYSTEMS - 2013. PIERRE DUCLOS WORKSHOP" | On the asymptotics of the principal eigenvalue for a Robin problem with a large parameter in planar domain | Abstract PDF (Eng) similar documents |
| K. Pankrashkin | ||
| "... , and let ѵ denote the inward unit normal vector on Σ. We study the principal eigenvalue E(β ..." | ||
| Vol 3, No 4 (2012) | Hamiltonian with zero-range potentials having infinite number of eigenvalues | Abstract similar documents |
| A. A. Boitsev, I. Yu. Popov, O. V. Sokolov | ||
| Vol 3, No 3 (2012) | Variational estimations of the eigenvalues for 3D quantum waveguides in a transverse electric field | Abstract PDF (Eng) similar documents |
| D. G. Matveev, I. Yu. Popov | ||
| "... It is shown that an eigenvalue of the Laplacian exists below the continuous spectrum for a system ..." | ||
| 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 16, No 6 (2025) | On the existence of the maximum number of isolated eigenvalues for a lattice Schrödinger operator | Abstract PDF (Eng) similar documents |
| S. N. Lakaev, D. A. Latipova, M. O. Akhmadova | ||
| "... eigenvalues that lie either below the bottom or above the top of its essential spectrum, over all K ∈ T2. ..." | ||
| 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 generalized Friedrichs models. It is established that the essential spectrum of Aµ consists the union ..." | ||
| 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 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 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 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 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 5 (2019) | Analytic description of the essential spectrum of a family of 3x3 operator matrices | Abstract PDF (Eng) similar documents |
| T. H. Rasulov, N. A. Tosheva | ||
| Vol 16, No 5 (2025) | Nonlinear optimal control problem in a two-point boundary regime for a pseudoparabolic equation with Samarskii–Ionkin type conditions | Abstract PDF (Eng) similar documents |
| T. K. Yuldashev, B. J. Kadirkulov, A. T. Ramazanova, Zh. Zh. Shermamatov | ||
| "... and eigenvalues, eigenfunctions and optimality conditions are found. Loaded nonlinear functional equations ..." | ||
| 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 13, No 1 (2022) | A model of sheared nanoribbons | Abstract PDF (Eng) similar documents |
| Ph. Briet | ||
| "... eigenvalue. In a second part we discuss the existence of discrete spectrum. ..." | ||
| 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 16, No 5 (2025) | Spectral analysis of two-particle Hamiltonians with short-range interactions | Abstract PDF (Eng) similar documents |
| M. O. Akhmadova, M. A. Azizova | ||
| "... . To elucidate the mechanisms of eigenvalue birth and annihilation for Hea λµ(0), we define a critical operator ..." | ||
| Vol 4, No 4 (2013): Special Issue. INTERNATIONAL CONFERENCE "MATHEMATICAL CHALLENGE OF QUANTUM TRANSPORT IN NANOSYSTEMS - 2013. PIERRE DUCLOS WORKSHOP" | Efimov’s effect for partial integral operators of Fredholm type | Abstract PDF (Eng) similar documents |
| Yu. Kh. Eshkabilov, R. R. Kucharov | ||
| "... We study the existence of an infinite number of eigenvalues (the existence of Efimov’s effect ..." | ||
| 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 10, No 2 (2019) | A model of an electron in a quantum graph interacting with a two-level system | Abstract PDF (Eng) similar documents |
| A. A. Boitsev, I. Y. Popov | ||
| "... . The operator describing the model has the form of sum of tensor products. Self-adjoint extensions ..." | ||
| 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 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 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 6, No 3 (2015) | Statistical mechanics of transport processes of fluids under confined conditions | Abstract PDF (Eng) similar documents |
| V. Rudyak, A. Belkin | ||
| "... show that the transport equations in confined spaces should contain not only the stress tensor ..." | ||
| Vol 6, No 6 (2015) | Parameterization of an interaction operator of optical modes in a single-mode optical fiber | Abstract PDF (Eng) similar documents |
| G. P. Miroshnichenko | ||
| "... profile, rotation angle per unit length, elasto-optical tensor, and refraction coefficient. ..." | ||
| 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 2, No 2 (2011) | Stability of 2D triangular lattice under finite biaxial strain | Abstract PDF (Eng) similar documents |
| E. A. Podolskaya, A. yu. Panchenko, A. M. Krivtsov | ||
| "... diagonal strain tensor is regarded. The lattice is considered infinite and consisting of particles which ..." | ||
| Vol 2, No 2 (2011) | Localization of bending vibrations in the single-wall carbon nanotubes | Abstract PDF (Eng) similar documents |
| V. V. Smirnov, D. S. Shepelev, L. I. Manevitch | ||
| "... tendency to localization of oscillation is the common property of the systems, the eigenvalue spectra ..." | ||
| Vol 4, No 2 (2013) | Multi particle states calculations and particles storage in perturbed nanolayers | Abstract PDF (Eng) similar documents |
| S. I. Popov | ||
| "... of nanolayers can lead to the appearanceof eigenvalues of the corresponding one-particle Hamiltonian. To study ..." | ||
| Vol 4, No 4 (2013): Special Issue. INTERNATIONAL CONFERENCE "MATHEMATICAL CHALLENGE OF QUANTUM TRANSPORT IN NANOSYSTEMS - 2013. PIERRE DUCLOS WORKSHOP" | Hartree-Fock approximation for the problem of particle storage in deformed nanolayer | Abstract PDF (Eng) similar documents |
| I. F. Melikhov, I. Yu. Popov | ||
| "... means that the corresponding Hamiltonian will have eigenvalues. To treat a multi-particle problem ..." | ||
| 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 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 ..." | ||
| 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 2, No 4 (2011) | Effect of electric field on the structure of the ferroelectric chevron smectics C* | Abstract similar documents |
| V. P. Romanov, S. V. Ulyanov, K. G. Chernyak | ||
| "... the principal values of the permittivity tensor. It was shown that in some cases the increase of the external ..." | ||
| Vol 6, No 1 (2015) | A linearized model of quantum transport in the asymptotic regime of quantum wells | Abstract PDF (Eng) similar documents |
| A. Mantile | ||
| "... to identify the resonances with the eigenvalues of a deformed operator. Then, the adiabatic evolution problem ..." | ||
| Vol 8, No 1 (2017) | Equilibrium properties of 3-arm star-shaped polyions: an entropic sampling Monte Carlo study | Abstract PDF (Eng) similar documents |
| I. A. Silanteva, A. A. Yurchenko, P. N. Vorontsov-Velyaminov, A. P. Lyubartsev | ||
| "... of the tensor of inertia and parameters characterizing the shape of the polyion. In this work, we focus on how ..." | ||
| Vol 16, No 3 (2025) | Magnetic structure of domain walls in stressed cylindrical wires | Abstract PDF (Eng) similar documents |
| K. A. Chichay, I. S. Lobanov, V. M. Uzdin | ||
| "... %. These results demonstrate that incorporating the full stress tensor is essential for accurate prediction of both ..." | ||
| 1 - 62 of 62 Items | ||
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