-symmetric operators: comments and some open problems.
Decomposition of unbounded derivations into invariant and approximately inner parts.
Derivations, dynamical systems, and spectral restrictions.
Derivations in Banach algebras.
Derivations mapping into the socle, III
Let A be a Banach algebra, and let d: A → A be a continuous derivation such that each element in the range of d has a finite spectrum. In a series of papers it has been proved that such a derivation is an inner derivation implemented by an element from the socle modulo the radical of A (a precise formulation of this statement can be found in the Introduction). The aim of this paper is twofold: we extend this result to the case where d is not necessarily continuous, and we give a complete description...
Derivations of certain operator algebras.
Derivations of quasi -algebras.
Derivations on Banach algebras.
Derivations on noncommutative Banach algebras
We discuss range inclusion results for derivations on noncommutative Banach algebras from the point of view of ring theory.
Domaine numérique de l'opérateur produit M2,A,B et de la dérivation généralisée δ2,A,B.