Commutants of the Pommiez operator.
Commutants of the Square of Differentiation on the Half-Line
MSC 2010: Primary: 447B37; Secondary: 47B38, 47A15
Commutants of unbounded derivations in C*-algebras.
Commutateurs de certains semi-groupes holomorphes et applications aux directions alternées
Commutateurs d'intégrales singulières et opérateurs multilinéaires
Si est une fonction de classe à support compacte et si est un opérateur pseudo-différentiel classique d’ordre 1, l’opérateur est borné sur . Ce résultat se généralise aux commutateurs d’ordre supérieur.
Commutation relations involving spectrally scattered operators
Commutative Banach Algebras and Decomposable Operators.
Commutative harmonic analysis and Banach spaces
Commutative nonstationary stochastic fields
The present paper is devoted to further development of commutative nonstationary field themes; the first studies in this area were performed by K. Kirchev and V. Zolotarev [4, 5]. In this paper a more complicated variant of commutative field with nonstationary rank 2, carrying into more general situation for correlation function is studied. A condition of consistency (see (7) below) for commutative field is placed in the basis of the method proposed in [4, 5] and developed in this paper. The following...
Commutativity of compact selfadjoint operators
The relationship between the joint spectrum γ(A) of an n-tuple of selfadjoint operators and the support of the corresponding Weyl calculus T(A) : f ↦ f(A) is discussed. It is shown that one always has γ(A) ⊂ supp (T(A)). Moreover, when the operators are compact, equality occurs if and only if the operators mutually commute. In the non-commuting case the equality fails badly: While γ(A) is countable, supp(T(A)) has to be an uncountable set. An example is given showing that, for non-compact operators,...
Commutativity of set-valued cosine families
Let K be a closed convex cone with nonempty interior in a real Banach space and let cc(K) denote the family of all nonempty convex compact subsets of K. If F t: t ≥ 0 is a regular cosine family of continuous additive set-valued functions F t: K → cc(K) such that x ∈ F t(x) for t ≥ 0 and x ∈ K, then .
Commutator characterization of periodic pseudodifferential operators.
Commutator Methods and a Smoothing Property of the Schrödinger Evolution Group.
Commutators and generators.
Commutators and generators II.
Commutators associated to a subfactor and its relative commutants
Let be an inclusion of factors with finite Jones index. Then as a vector space. Here denotes the vector space spanned by the commutators of the form where .
Commutators based on the Calderón reproducing formula
We prove the Schatten-Lorentz ideal criteria for commutators of multiplications and projections based on the Calderón reproducing formula and the decomposition theorem for the space of symbols corresponding to commutators in the Schatten ideal.
Commutators in Banach *-algebras
The set of commutators in a Banach *-algebra A, with continuous involution, is examined. Applications are made to the case where A = B(ℓ₂), the algebra of all bounded linear operators on ℓ₂.
Commutators in real interpolation with quasi-power parameters.
Commutators of compact operators.