Cyclic vectors for operator algebras
Cyclically compact operators in Banach spaces.
Cyclicity of the adjoint of weighted composition operators on the Hilbert space of analytic functions
In this paper, we discuss the hypercyclicity, supercyclicity and cyclicity of the adjoint of a weighted composition operator on a Hilbert space of analytic functions.
-symmetric operators: comments and some open problems.
Darstellung von Banach-Verbänden und Sätze vom Korovkin-Typ.
Das Eigenwerttheorem von Krasnoselski für -kondensierende Abbildungen
Das Lomonosov-Lemma für topologische Vektorräume.
Das modifizierte Newton-Verfahren in verallgemeinerten Banach-Räumen.
Das Randwertproblem für eine Klasse singulärer gewöhnlicher Differentialausdrücke.
Das Randwertproblem für eine Klasse singulärer gewöhnlicher Differentialausdrücke. (Short Communication).
Das Spektrum von Verbandsoperatoren in Banachverbänden.
Das verallgemeinerte Inverse eines linearen Operators in Vektorräumen mit nicht ausgearteter Hermitescher Metrik über einenm kommutativen Körper.
Data dependence for Ishikawa iteration when dealing with contractive-like operators.
Data dependence for some integral equation via weakly Picard operators.
Decay of solutions of some nonlinear equations.
Decaying Regularly Varying Solutions of Third-order Differential Equations with a Singular Nonlinearity
This paper is concerned with asymptotic analysis of strongly decaying solutions of the third-order singular differential equation , by means of regularly varying functions, where is a positive constant and is a positive continuous function on . It is shown that if is a regularly varying function, then it is possible to establish necessary and sufficient conditions for the existence of slowly varying solutions and regularly varying solutions of (A) which decrease to as and to acquire...
Decoherence of quantum Markov semigroups
Decomposability of Cylindrical Martingales and Absolutely Summing Operators.
Decomposability of extremal positive unital maps on M₂(ℂ)
A map φ: Mₘ(ℂ) → Mₙ(ℂ) is decomposable if it is of the form φ = φ₁ + φ₂ where φ₁ is a CP map while φ₂ is a co-CP map. It is known that if m = n = 2 then every positive map is decomposable. Given an extremal unital positive map φ: M₂(ℂ) → M₂(ℂ) we construct concrete maps (not necessarily unital) φ₁ and φ₂ which give a decomposition of φ. We also show that in most cases this decomposition is unique.
Decomposability of operator-valued functions