Compatibility Operators for Degenerate Elliptic Equations on the Ball and Heisenberg Groups.
Complemented kernels of partial differential operators in weighted spaces of (generalized) functions
Comportement asymptotique de la distribution des valeurs propres de l'équation de Schrödinger associé à certains champs magnétiques sur un cylindre
Comportement asymptotique de la phase de diffusion pour des obstacles non-convexes
Comportement asymptotique des valeurs propres d'opérateurs elliptiques dégénérés
Comportement asymptotique des valeurs propres d'une classe d'opérateurs elliptiques et dégénérés en dimension 2
Comportement asymptotique des valeurs propres d’une classe d’opérateurs elliptiques dégénérés en dimension
Computable Bounds for Eigenvalues and Eigenfunctions of Elliptic Differential Operators.
Continuous linear right inverses for partial differential operators of order 2 and fundamental solutions in half spaces.
Convergence dans le domaine complexe des séries de fonctions propres
Convergenza e dualità per forme di Dirichlet non-simmetriche
Correction "Almost everywhere summability of eiegnfunction expansion associated to elliptic operators" by Waldemar Hebish, Studia Math. 96(3) 1990, 263-275
Correction to my paper: “Existence theorems for operator equations and nonlinear elliptic boundary-value problems” [Comment. Math. Univ. Carolinae 14 (1973), 27-46]
Correction to: Spectral Geometry and the Kaehler Condition for Complex Manifolds.
Corrigenda to "Unique continuation for Schrödinger operators" and a remark on interpolation of Morrey spaces.
The purpose of this note is twofold. First it is a corrigenda of our paper [RV1]. And secondly we make some remarks concerning the interpolation properties of Morrey spaces.
Decomposable systems of differential operators and generalized inverses
Deficiency Indices of Singular Schrödinger Operators.
Degenerate differential operators with parameters.
Degree theory for VMO maps on metric spaces
We construct a degree theory for Vanishing Mean Oscillation functions in metric spaces, following some ideas of Brezis & Nirenberg. The underlying sets of our metric spaces are bounded open subsets of and their boundaries. Then, we apply our results in order to analyze the surjectivity properties of the -harmonic extensions of VMO vector-valued functions. The operators we are dealing with are second order linear differential operators sum of squares of vector fields satisfying the hypoellipticity...
Dense point spectrum and absolutely continuous spectrum in spherically symmetric Dirac operators.