An abstract version of the resonance theorem
An Lp Estimate for the Difference of Derivatives of Spectral Expansions Arising by One-dimensional Schroedinger Operators
Application of sequential shifts to an interpolation problem.
In the present paper initial operators for a right invertible operator, which are induced by sequential shifts and have the property c(R) are constructed. An application to the Lagrange type interpolation problem is given. Moreover, an example with the Pommiez operator is studied.
Approximate solutions and error bounds for second order operator differential equations
Aufspaltungen linearer gewöhnlicher Differentialoperatoren und der zugehörigen Greenschen Funktion.
Averaging in an ordinary differential equation.
Bargmann-type inequality for half-linear differential operators.
Bergman spaces on some tube-type domains and Laguerre operators on symmetric cones.
Boundary conditions for one-dimensional positive semigroups.
Boundary value problem for second-order differential operators with mixed nonlocal boundary conditions.
Boundary value problems and controllability of linear systems with right invertible operators [Book]
Boundary-value problems for second-order differential operators with nonlocal boundary conditions.
C*-Algebras of Singular Integral operators on the line realted to singular Sturm-Liouville problems.
Compactness in certain abstract function spaces with application to differential inclusions
In this note we present a result on compactness in certain Banach spaces of vector valued functions. We demonstrate an application of this result to the questions of existence of solutions of nonlinear differential inclusions on a Banach space.
Compactness of the inverse of the minimal operator for a class of ordinary differential expressions.
Completeness of elementary solutions of second order elliptic equations in a semi-infinite tube domain.
Das Randwertproblem für eine Klasse singulärer gewöhnlicher Differentialausdrücke.
Das Randwertproblem für eine Klasse singulärer gewöhnlicher Differentialausdrücke. (Short Communication).
Decomposition conditions for two-point boundary value problems.
Degenerate evolution problems and Beta-type operators
The present paper is concerned with the study of the differential operator Au(x):=α(x)u”(x)+β(x)u’(x) in the space C([0,1)] and of its adjoint Bv(x):=((αv)’(x)-β(x)v(x))’ in the space , where α(x):=x(1-x)/2 (0≤x≤1). A careful analysis of their main properties is carried out in view of some generation results available in [6, 12, 20] and [25]. In addition, we introduce and study two different kinds of Beta-type operators as a generalization of similar operators defined in [18]. Among the corresponding...