-Topologies on the Test Function Algebra
On generalized eigenfunctions of operators in a Hilbert space
On pairs of automorphisms of von Neumann algebras.
On reflexive subobject lattices and reflexive endomorphism algebras
In this paper we study the reflexive subobject lattices and reflexive endomorphism algebras in a concrete category. For the category Set of sets and mappings, a complete characterization for both reflexive subobject lattices and reflexive endomorphism algebras is obtained. Some partial results are also proved for the category of abelian groups.
On strong generation of B(ℋ) by two commutative C*-algebras
The algebra B(ℋ) of all bounded operators on a Hilbert space ℋ is generated in the strong operator topology by a single one-dimensional projection and a family of commuting unitary operators with cardinality not exceeding dim ℋ. This answers Problem 8 posed by W. Żelazko in [6].
On the Geometry of Positive Maps in Matrix Algebras.
On the operator equation .
On the o-Spectrum of Order Bounded Operators.
On the structure of self adjoint algebra of finite strict multiplicity.
On the Translation Invariance of Wavelet Subspaces.
Opérateurs multiplicativement liés
Opérateurs Paraboliques Dans Le Calcul Opérationnel Des Distributions A Support Dans Rn+ n ≥ 1
Operators preserving ideals in C*-algebras
The aim of this paper is to prove that derivations of a C*-algebra A can be characterized in the space of all linear continuous operators T : A → A by the conditions T(1) = 0, T(L∩R) ⊂ L + R for any closed left ideal L and right ideal R. As a corollary we get an extension of the result of Kadison [5] on local derivations in W*-algebras. Stronger results of this kind are proved under some additional conditions on the cohomologies of A.