Eigenvalue computations for regular matrix Sturm-Liouville problems.
Eigenvalue formulas for the uniform Timoshenko beam: the free-free problem.
Eigenvalue Inequalities for the Dirichlet Problem on Spheres and the Growth of Subharmonic Functions
Eigenvalue problems for -Laplacian functional dynamic equations on time scales.
Eigenvalue problems for systems of nonlinear boundary value problems on time scales.
Ein Äquikonvergenzsatz für eine Klasse von singulären Differentialoperatoren.
Ein Gegenbeispiel zur Stabilität des absolut stetigen Spektrums gewöhnlicher Differentialoperatoren.
Équilibre instable en régime semi-classique
Équilibre instable en régime semi-classique. II. Conditions de Bohr-Sommerfeld
Error analysis of Adomian series solution to a class of nonlinear differential equations.
Essential self-adjointness of symmetric linear relations associated to first order systems
The purpose of this note is to present several criteria for essential self-adjointness. The method is based on ideas due to Shubin. This note is divided into two parts. The first part deals with symmetric first order systems on the line in the most general setting. Such a symmetric first order system of differential equations gives rise naturally to a symmetric linear relation in a Hilbert space. In this case even regularity is nontrivial. We will announce a regularity result and discuss criteria...
Estimates for Derivatives and Integrals of Eigenfunctions and Associated Functions of Nonselfadjoint Sturm-Liouville Operator With Discontinuous Coefficients (II)
Estimates for the Eigenvalues of Hill's Equation and Applications for the Eigenvalues of the Laplacian on Toroidal Surfaces.
Estimates on the eigenvalues for some nonlinear ordinary differential operators
Estimations asymptotiques des valeurs propres de l'équation de Hill polynomiale
Étude qualitative des solutions réelles d'une équation différentielle liée à l'équation de Ginzburg-Landau
Existence and location result for the bending of a single elastic beam
Existence of Periodic Solutions for Nonlinear Neutral Dynamic Equations with Functional Delay on a Time Scale
Let be a periodic time scale. The purpose of this paper is to use a modification of Krasnoselskii’s fixed point theorem due to Burton to prove the existence of periodic solutions on time scale of the nonlinear dynamic equation with variable delay , , where is the -derivative on and is the -derivative on . We invert the given equation to obtain an equivalent integral equation from which we define a fixed point mapping written as a sum of a large contraction and a compact map. We show...
Expansion of solutions of T'Hooft's equation. A study in the confluence of analytic boundary conditions.
Explicit solutions for non homogeneous Sturm-Liouville operators problems.
In this paper we study existence and sufficiency conditions for the solutions of Sturm-Liouville operator problems related to the operator differential equation X'' - QX = F(t). Explicit solutions of the problem in terms of a square root of the operator Q are given.