Results 51 to 60 of about 822,201 (162)
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012 We consider a model operator H associated to a system of three particles interacting via nonlocal pair potentials on a three dimensional lattice. The existence conditions of the eigenvalues of a corresponding Friedrichs model are found and the structure ...
Tulkin Kh Rasulov
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Study on biofilm formation by Extended Spectrum β-lactamase (ESBL) producing Klebsiella isolates
Zagazig Journal of Pharmaceutical Sciences, 2014 Infections caused by multidrug-resistant Klebsiella species that produce Extended-Spectrum β-lactamase (ESBL) enzymes have been reported with increasing frequency in intensive-care units and are associated with significant morbidity and mortality ...
Hemmat K. Abd El Latif +3 more
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Faddeev equation and its symmetric version for a three-particle lattice hamiltonian [PDF]
E3S Web of ConferencesIn the present paper we consider the three-particle lattice Hamiltonian associated to a system of three particles on the d-dimensional lattice, where the role of two-particle discrete Schroedinger operators is played by a family of Friedrichs models.
Umirkulova Gulhayo H. +4 more
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Journal of Education, Health and Sport, 2019 Introduction: Explanation of pathogenesis and selection of an effective therapeutic form to treat children with autism spectrum disorders (ASD) is still one of today's challenges.
Przemysław Szabat +5 more
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The essential spectrum of the Laplacian
, 2012 In this article we prove a generalization of Weyl's criterion for the essential spectrum of a self-adjoint operator on a Hilbert space. We then apply this criterion to the Laplacian on functions over open manifolds and get new results for its essential spectrum.
Charalambous, Nelia, Lu, Zhiqin
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Ascent and Essential Ascent Spectrum of Linear Relations
Extracta Mathematicae, 2016 In the present paper, we study the ascent of a linear relation everywhere defined on a Banach space X and the related essential ascent spectrum. Some properties and characterization of such spectra are given.
Ezzeddine Chafai, Maher Mnif
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The radius of the essential spectrum
Journal of Mathematical Analysis and Applications, 1987 An operator measure s is introduced axiomatically as a map from L(X) (bounded linear operators on the Banach space X into the nonnegative real numbers) which vanishes on all finite rank operators and only on compact operators, is dominated by the norm function and is subadditive and submultiplicative.
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The Essential Spectrum of a Sequence of Linear Operators in Banach Spaces
International Journal of Analysis and Applications, 2017 In this work we introduce some essential spectra $(\sigma_{ei}, i=1,...,5)$ of a sequence of closed linear operators $(T_{n})_{n\in\mathbb{N}}$ on Banach space, we prove that if $(T_{n})_{n\in\mathbb{N}}$ converges in the generalized sense to a closed ...
Aymen Ammar, Noui Djaidja, Aref Jeribi
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Stability of essential approximate point spectrum and essential defect spectrum of linear operator
Filomat, 2015 In the present paper, we use the notion of measure of noncompactness to give some results on Fredholm operators and we establish a fine description of the essential approximate point spectrum and the essential defect spectrum of a closed densely defined linear operator.
Aymen Ammar +2 more
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Essentially hyponormal operators with essential spectrum contained in a circle
Le Matematiche, 2009 In this paper two results are given . It is proved that if the essential spectrum σ(π(T)) of the bounded hyponormal operator T is contained in a circle, then T is essentially normal operator. Based on this result it is proved that if T∈ L(H) with ind T =
Shquipe I. Lohaj, Muhib R. Lohaj
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