Absolutely--summing operators in -spaces I
A. Pietsch (1970-1971)
Séminaire Équations aux dérivées partielles (Polytechnique)
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A. Pietsch (1970-1971)
Séminaire Équations aux dérivées partielles (Polytechnique)
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A. Pietsch (1970-1971)
Séminaire Équations aux dérivées partielles (Polytechnique)
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M. A. Fugarolas (2004)
Colloquium Mathematicae
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Let Π₂ be the operator ideal of all absolutely 2-summing operators and let be the identity map of the m-dimensional linear space. We first establish upper estimates for some mixing norms of . Employing these estimates, we study the embedding operators between Besov function spaces as mixing operators. The result obtained is applied to give sufficient conditions under which certain kinds of integral operators, acting on a Besov function space, belong to Π₂; in this context, we also...
Árpád Bényi, Kasso A. Okoudjou (2006)
Studia Mathematica
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We prove that for symbols in the modulation spaces , p ≥ q, the associated multilinear pseudodifferential operators are bounded on products of appropriate modulation spaces. In particular, the symbols we study here are defined without any reference to smoothness, but rather in terms of their time-frequency behavior.
(2011)
Banach Center Publications
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Let E be a Banach function space over a finite and atomless measure space (Ω,Σ,μ) and let and be real Banach spaces. A linear operator T acting from the Köthe-Bochner space E(X) to Y is said to be absolutely continuous if whenever μ(Aₙ) → 0, (Aₙ) ⊂ Σ. In this paper we examine absolutely continuous operators from E(X) to Y. Moreover, we establish relationships between different classes of linear operators from E(X) to Y.
S. Kwapień (1970)
Studia Mathematica
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Dumitru Popa (2014)
Studia Mathematica
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We use the Maurey-Rosenthal factorization theorem to obtain a new characterization of multiple 2-summing operators on a product of spaces. This characterization is used to show that multiple s-summing operators on a product of spaces with values in a Hilbert space are characterized by the boundedness of a natural multilinear functional (1 ≤ s ≤ 2). We use these results to show that there exist many natural multiple s-summing operators such that none of the associated linear operators...
Manuel A. Fugarolas (2011)
Czechoslovak Mathematical Journal
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Let and . We prove that , the ideal of operators of Geľfand type , is contained in the ideal of -absolutely summing operators. For this generalizes a result of G. Bennett given for operators on a Hilbert space.
Nicole Tomczak (1970)
Studia Mathematica
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Nicolae Tita (1980)
Revista de la Real Academia de Ciencias Exactas Físicas y Naturales
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