Charakterisierungen zeilenendlicher Matrizen mit abzählbarem Spektrum.
Commutants of the Square of Differentiation on the Half-Line
MSC 2010: Primary: 447B37; Secondary: 47B38, 47A15
Compact diagonal linear operators on Banach spaces with unconditional bases.
Compact Integral Operators on Banach Function Spaces.
Consequences of the existence of a non-compact operator between nuclear Köthe spaces.
Continuity of superposition operators on and
Continuous rearrangements of the Haar system in for 0 < p < ∞
We prove three theorems on linear operators induced by rearrangement of a subsequence of a Haar system. We find a sufficient and necessary condition for to be continuous for 0 < p < ∞.
Continuous restrictions of linear maps between Banach spaces
Convolution of Nörlund methods in non-archimedean fields
Corrigendum to "On the spectral multiplicity of a direct sum of operators" (Colloq. Math. 104 (2006), 105-112)
Criteria on boundedness of matrix operators in weighted spaces of sequences and their applications.
Description of invariant subspaces of Lp(μ) by multiplication operators.
(E,F)-Schur multipliers and applications
For two given symmetric sequence spaces E and F we study the (E,F)-multiplier space, that is, the space of all matrices M for which the Schur product M ∗ A maps E into F boundedly whenever A does. We obtain several results asserting continuous embedding of the (E,F)-multiplier space into the classical (p,q)-multiplier space (that is, when , ). Furthermore, we present many examples of symmetric sequence spaces E and F whose projective and injective tensor products are not isomorphic to any subspace...
Ein Satz über gewichtete Verschiebungen.
Entropy numbers of certain summation operators.
Entropy numbers of r-nuclear operators between spaces
Erratum: “Lower bounds for some factorable matrices" [Int. J. Math. Math. Sci. 2006, No. 14, Article ID 76135 (2006; Zbl pre05231649)].
Erratum to "Operators on spaces of analytic functions" (Studia Math, 108 (1994), 49-54)
Estructuras ordenadas relacionadas con el teorema de la gráfica cerrada.
Exponential dichotomy of difference equations in -phase spaces on the half-line.