Demiclosed principle for asymptotically nonexpansive mappings in CAT(0) spaces.
Dense point spectrum and absolutely continuous spectrum in spherically symmetric Dirac operators.
Dense range perturbations of hypercyclic operators
We show that if (Tₙ) is a hypercyclic sequence of linear operators on a locally convex space and (Sₙ) is a sequence of linear operators such that the image of each orbit under every linear functional is non-dense then the sequence (Tₙ + Sₙ) has dense range. Furthermore, it is proved that if T,S are commuting linear operators in such a way that T is hypercyclic and all orbits under S satisfy the above non-denseness property then T - S has dense range. Corresponding statements for operators and sequences...
Dense sets and far-field patterns for the vector thermoelastic equation
Denseness of norm attaining mappings.
The Bishop-Phelps Theorem states that the set of (bounded and linear) functionals on a Banach space that attain their norms is dense in the dual. In the complex case, Lomonosov proved that there may be a closed, convex and bounded subset C of a Banach space such that the set of functionals whose maximum modulus is attained on C is not dense in the dual. This paper contains a survey of versions for operators, multilinear forms and polynomials of the Bishop-Phelps Theorem. Lindenstrauss provided examples...
Density theorems for measurable transformations
Denting point in the space of operator-valued continuous maps.
In a former paper we describe the geometric properties of the space of continuous functions with values in the space of operators acting on a Hilbert space. In particular we show that dent B(L(H)) = ext B(L(H)) if dim H < 8 and card K < 8 and dent B(L(H)) = 0 if dim H < 8 or card K = 8, and x-ext C(K,L(H)) = ext C(K,L(H)).
Dependence of a weak solution of the first order differential equation on a parameter.
Dependence of fractional powers of elliptic operators on boundary conditions
The realization of an elliptic operator A under suitable boundary conditions is considered and the dependence of the square-root of A from the various conditions is studied.
Dependence of the buckling load of a nonshallow arch with respect to the shape of its midcurve
Dependence results on almost periodic and almost automorphic solutions of evolution equations.
Der Fixpunktsatz in Funktionalraümen
Der Generator stark stetiger Verbandshalbgruppen auf C (X) und dessen Spektrum.
Der Konjugiertenoperator auf rearrangement-invarianten Funktionenräumen.
Der „Satz von der gleichmässigen Beschranktheit‟ für eine Klasse nichtlinearer Operatoren
Der spektrale Abbildungssatz für nichtanalytische Funktionalkalküle in mehreren Veränderlichen.
Dérivabilité du plus grand exposant caractéristique des produits de matrices aléatoires indépendantes à coefficients positifs
Derivations, dynamical systems, and spectral restrictions.
Derivations in Banach algebras.
Derivations into iterated duals of Banach algebras
We introduce two new notions of amenability for a Banach algebra A. The algebra A is n-weakly amenable (for n ∈ ℕ) if the first continuous cohomology group of A with coefficients in the n th dual space is zero; i.e., . Further, A is permanently weakly amenable if A is n-weakly amenable for each n ∈ ℕ. We begin by examining the relations between m-weak amenability and n-weak amenability for distinct m,n ∈ ℕ. We then examine when Banach algebras in various classes are n-weakly amenable; we study...