Add to ORKGOperators on function spaces of form Cɸf = f ∘ ɸ, where ɸ is a fixed map are called composition operators with symbol ɸ. We study such operators acting on the Hilbert Hardy space over the right half-plane and characterize the situations when they are invertible, Fredholm, unitary, and Hermitian. We determine the normal composition operators with inner, respectively with Möbius symbol. In select cases, we calculate their spectra, essential spectra, and numerical ranges
Starting with a general formula, precise but difficult to use, for the adjoint of a composition oper...
Multipliers of reproducing kernel Hilbert spaces can be characterized in terms of positivity of $n \...
Cette thèse est consacrée à l’étude des opérateurs de Toeplitz et des opérateursde composition sur l...
Operators on function spaces of form Cɸf = f ∘ ɸ, where ɸ is a fixed map are called composition oper...
Operators on function spaces of form... is a fixed map are called composition operators with symbol ...
Operators of type f→ψf∘ϕ acting on function spaces are called weighted composition operators. If the...
Abstract. In this paper we investigate the following problem: when a bounded analytic function ϕ on ...
Boundedness of weighted composition operators W u,φ acting on the classical Dirichlet space D as W u...
In this paper, we characterize the boundedness, the compactness and the Hilbert-Schmidt property for...
AbstractFor a finite Blaschke product B let TB denote the analytic multiplication operator (also cal...
In this paper we consider composition operators Cφ on the Hilbert Hardy space over the unit disc, in...
For α ∈ R, let Dα denote the scale of Hilbert spaces consisting of Dirichlet series f(s) = P∞ n=1 an...
Les travaux présentés dans cette thèse concernent l'étude d'opérateurs sur certains espaces de Banac...
We show that a Carleson measure satisfies the reverse Carleson condition if and only if its Berezin ...
Let ϕ : D → D be a holomorphic map with a fixed point α ∈ D such that 0 ≤ |ϕ (α)| < 1. We show that ...
Starting with a general formula, precise but difficult to use, for the adjoint of a composition oper...
Multipliers of reproducing kernel Hilbert spaces can be characterized in terms of positivity of $n \...
Cette thèse est consacrée à l’étude des opérateurs de Toeplitz et des opérateursde composition sur l...
Operators on function spaces of form Cɸf = f ∘ ɸ, where ɸ is a fixed map are called composition oper...
Operators on function spaces of form... is a fixed map are called composition operators with symbol ...
Operators of type f→ψf∘ϕ acting on function spaces are called weighted composition operators. If the...
Abstract. In this paper we investigate the following problem: when a bounded analytic function ϕ on ...
Boundedness of weighted composition operators W u,φ acting on the classical Dirichlet space D as W u...
In this paper, we characterize the boundedness, the compactness and the Hilbert-Schmidt property for...
AbstractFor a finite Blaschke product B let TB denote the analytic multiplication operator (also cal...
In this paper we consider composition operators Cφ on the Hilbert Hardy space over the unit disc, in...
For α ∈ R, let Dα denote the scale of Hilbert spaces consisting of Dirichlet series f(s) = P∞ n=1 an...
Les travaux présentés dans cette thèse concernent l'étude d'opérateurs sur certains espaces de Banac...
We show that a Carleson measure satisfies the reverse Carleson condition if and only if its Berezin ...
Let ϕ : D → D be a holomorphic map with a fixed point α ∈ D such that 0 ≤ |ϕ (α)| < 1. We show that ...
Starting with a general formula, precise but difficult to use, for the adjoint of a composition oper...
Multipliers of reproducing kernel Hilbert spaces can be characterized in terms of positivity of $n \...
Cette thèse est consacrée à l’étude des opérateurs de Toeplitz et des opérateursde composition sur l...