Spectral analysis for differential operators with singularities.
Spectral asymptotics for inverse nonlinear Sturm-Liouville problems.
Spectral asymptotics for nonlinear multiparameter problems with indefinite nonlinearities
Spectral asymptotics for nonlinear Sturm-Liouville problems.
Spectral asymptotics for nonsmooth perturbations of the harmonic oscillator.
Spectral bisection algorithm for solving Schrödinger equation using upper and lower solutions.
Spectral concentration in Sturm-Liouville equations with large negative potential.
Spectral convergence of the discrete Laplacian on models of a metrized graph.
Spectral curves of operators with elliptic coefficients.
Spectral properties of general self-adjoint, even order differential operators
Spectral properties of some regular boundary value problems for fourth order differential operators
In this paper we consider the problem where λ is a spectral parameter; p j (x) ∈ L 1(0, 1), j = 0, 1, 2, are complex-valued functions; α s;l, s = 1, 2, 3, , are arbitrary complex constants; and σ = 0, 1. The boundary conditions of this problem are regular, but not strongly regular. Asymptotic formulae for eigenvalues and eigenfunctions of the considered boundary value problem are established in the case α 3,2 + α 1,0 ≠ α 2,1. It is proved that the system of root functions of this spectral problem...
Spectral singularities of Sturm-Liouville problems with eigenvalue-dependent boundary conditions.
Spectral Theory for Slowly Oscillating Potentials I. Jacobi Matrices.
Spectral Theory of Singular Hahn Difference Equation of the Sturm-Liouville Type
In this work, we consider the singular Hahn difference equation of the Sturm-Liouville type. We prove the existence of the spectral function for this equation. We establish Parseval equality and an expansion formula for this equation on a semi-unbounded interval.
Spectrum of a differential operator with periodic generalized potential.
Spectrum of linear difference operators and the solvability of nonlinear discrete problems.
Stark resonances for random potentials of Anderson type
Stone-reguläre Eigenwertprobleme.
Strong resonance problems for the one-dimensional -Laplacian.
Strong resonant tunneling, level repulsion and spectral type for one-dimensional adiabatic quasi-periodic Schrödinger operators