Results 21 to 30 of about 992,457 (282)

Compact covariance operators [PDF]

Proceedings of the American Mathematical Society, 1981
Let B be a real separable Banach space and R: i'->ia covariance operator. All representations of R in the form 2en ® e", (e", n > 1} c fi, are characterized. Necessary and sufficient conditions for R to be compact are ob- tained, including a generalization of Mercer's theorem. An application to character- istic functions is given. 1. Introduction.
Baker, Charles R., McKeague, Ian W.
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ASUPRA REGULARIZĂRII OPERATORILOR INTEGRALI SINGULARI. CRITERII NOETHERIENE

Acta et Commentationes: Ştiinţe Exacte şi ale Naturii, 2020
Lucrarea este consacrată studiului algebrei (închise) generată de operatorii integrali singulari cu coeficienți continui pe conturul Γ. Sunt stabilite condiţiile necesare şi suficiente în care operatorii din algebra A sunt noetherieni în spaţiul Lp (Γ ...
Vasile NEAGU
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Erratum to: Compactness properties for operators dominated by AM-compact operators [PDF]

Proceedings of the American Mathematical Society, 2009
In [ibid. 135, No. 4, 1151--1157 (2007; Zbl 1118.47029)], the authors have characterized Banach lattices such that operators dominated by AM-compact operators are AM-compact; but there was an error in the proof of this characterization. In this note, they give a new and correct proof by using a new lemma.
Aqzzouz, Belmesnaoui, Elbour, Aziz
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Compact operators in TRO’s [PDF]

Proceedings of the American Mathematical Society, 2012
We give a geometric characterization of the elements of a ternary ring of operators (or simply, TRO) that can be represented as compact operators by a faithful representation of the TRO.
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Composition operator induced by ?(z) = sz + t for which |s|?1, |t|<1 and |s|+|t|?1

مجلة بغداد للعلوم, 2010
We study in this paper the composition operator that is induced by ?(z) = sz + t. We give a characterization of the adjoint of composiotion operators generated by self-maps of the unit ball of form ?(z) = sz + t for which |s|?1, |t|
Baghdad Science Journal
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Representing the Banach operator ideal of completely continuous operators; pp. 189–193 [PDF]

Proceedings of the Estonian Academy of Sciences, 2017
Let V ;W∞ and W be the operator ideals of completely continuous, weakly ∞-compact, and weakly compact operators, respectively. In a recent paper, William B. Johnson, Eve Oja, and the author proved that V = W∞ ◦W -1 (Johnson, W. B., Lillemets, R.,
Rauni Lillemets
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Dynamics of a Compact Operator [PDF]

ISRN Mathematical Analysis, 2011
Let be a compact linear (or more generally affine) operator from a Banach space into itself. For each , the sequence of iterates , , 1, and its averages , 1, are either bounded or approach infinity.
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Conditions implying the uniqueness of the weak*-topology on certain group algebras [PDF]

, 2009
We investigate possible preduals of the measure algebra M(G) of a locally compact group and the Fourier algebra A(G) of a separable compact group. Both of these algebras are canonically dual spaces and the canonical preduals make the multiplication ...
Daws, M., White, S., lePham, H.
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Properties of Fuzzy Compact Linear Operators on Fuzzy Normed Spaces

مجلة بغداد للعلوم, 2019
In this paper the definition of fuzzy normed space is recalled and its basic properties. Then the definition of fuzzy compact operator from fuzzy normed space into another fuzzy normed space is introduced after that the proof of an operator is fuzzy ...
Kider et al.
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On Power Compact Operators [PDF]

Proceedings of the American Mathematical Society, 1980
We give an operator theoretic proof of the following result of D. G. Tacon: Theorem. If { T
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