Oscillateur quartique et méthodes semi-classiques
Parameters and solutions of linear and nonlinear oscillators.
Pointwise Lower and Upper Bounds for Eigenfunctions of Ordinary Differential Operators.
Pólya Operators I: Total Positivity.
Pólya Operators II: Complete Concavity.
Problèmes inverses pour des équations différentielles sur la droite
Properties of the scattering map.
Properties of the scattering map II.
Reguläre Eigenwertprobleme mit Mehrpunkt-Integral-Randbedingungen.
Regularized traces and conditions of smooth periodicity for the potential of Sturm-Liouville equation.
Relatively bounded and compact perturbations of th order differential operators.
Remark on Sturm-Liouville functions
Remarks on nonlinear noncoercive problems with jumping nonlinearities
Scattering Theory for Dirac Operators.
Scattering theory for hamiltonians with Stark effect
Schrödinger eigenvalue problem for the Gaussian potential
Selbstadjungierte Differentialoperatoren und nukleare (F)-Räume in A2 (C0).
Singular Sturm-Liouville Problems with Nonnegative and Indefinite Weights.
Small Potential Corrections for the Discrete Eigenvalues of the Sturm-Liouville Problem.
Some Inequalities Associated with Certain Ordinary Differential Operators.