منابع مشابه
Some topologies on the space of quasi-multipliers
Assume that $A$ is a Banach algebra. We define the $beta-$topology and the $gamma-$topology on the space $QM_{el}(A^{*})$ of all bounded extended left quasi-multipliers of $A^{*}.$ We establish further properties of $(QM_{el}(A^{*}),gamma)$ when $A$ is a $C^{*}-$algebra. In particular, we characterize the $gamma-$dual of $QM_{el}(A^{*})$ and prove that $(QM_{el}(A^{*}),gamma)^{*},$...
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In this paper we define the notion of weak Arens regular Banach algebras and extend the concept of quasi-multipliers to this certain class of Banach algebras. Among other the relationship between Arens regularity of the algebra A∗∗ of a weak Arens regular Banach algebra A and the space QMr(A∗) of all bilinear and separately continuous right quasimultipliers of A∗ is investigated. Further, we st...
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A result due to D. Luenberger on the existence of multipliers in a quasiconvex programming problem is extended to the case of constraints given by an arbitrary convex cone under a constraint qualification condition more general than Slater’s condition. The existence of solutions is not assumed. We point out links with even convexity in the sense of Fenchel, quasisubdifferentiability in the sens...
متن کاملQuasi-multipliers and Algebrizations of an Operator Space
Let X be an operator space, let φ be a product on X , and let (X, φ) denote the algebra that one obtains. We give necessary and sufficient conditions on the bilinear mapping φ for the algebra (X, φ) to have a completely isometric representation as an algebra of operators on some Hilbert space. In particular, we give an elegant geometrical characterization of such products by using the Haagerup ...
متن کاملOn the L2 → L∞ norms of spectral multipliers of “quasi- homogeneous” operators on homogeneous groups
We study the L2 → L∞ norms of spectral projections and spectral multipliers of left-invariant elliptic and subelliptic second-order differential operators on homogeneous Lie groups. We obtain a precise description of the L2 → L∞ norms of spectral multipliers for some class of operators which we call quasi-homogeneous. As an application we prove a stronger version of Alexopoulos’ spectral multip...
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ژورنال
عنوان ژورنال: Studia Mathematica
سال: 1994
ISSN: 0039-3223,1730-6337
DOI: 10.4064/sm-108-3-217-245