On certain trigonometric sums in several variables.
Poids associé à une algèbre hilbertienne à gauche
Poids et espérances conditionnelles dans les algèbres de von Neumann
Quadratic functionals on modules over complex Banach *-algebras with an approximate identity
The problem of representability of quadratic functionals by sesquilinear forms is studied in this article in the setting of a module over an algebra that belongs to a certain class of complex Banach *-algebras with an approximate identity. That class includes C*-algebras as well as H*-algebras and their trace classes. Each quadratic functional acting on such a module can be represented by a unique sesquilinear form. That form generally takes values in a larger algebra than the given quadratic functional...
Semi-simplicity of a proper weak -algebra.
Sobre el k.-completando de un módulo de Hilbert
Über die Zerlegung von Operatoren in topologischen direkten Integralen von Hilberträumen.