Results 21 to 30 of about 4,674,369 (143)
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011 A model operator H associated with the system of three-identical particles on a lattice ℤ3 is considered. The location of the essential spectrum of H is described by the spectrum of the corresponding Friedrichs model, that is, the two-particle and three ...
Tulkin Kh Rasulov
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Broad-Spectrum Antiviral Strategies and Nucleoside Analogues
Viruses, 2021 The emergence or re-emergence of viruses with epidemic and/or pandemic potential, such as Ebola, Zika, Middle East Respiratory Syndrome (MERS-CoV), Severe Acute Respiratory Syndrome Coronavirus 1 and 2 (SARS and SARS-CoV-2) viruses, or new strains of ...
Robert J. Geraghty +2 more
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The second four-electron singlet in the Hubbard impurity model
Современная математика: Фундаментальные направленияWe consider the energy operator of four-electron systems in the Hubbard impurity model and investigate the structure of the essential spectrum and discrete spectra for the second singlet state of the system.
S. M. Tashpulatov, R. T. Parmanova
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Spectral radius of S-essential spectra
Математичні Студії, 2020 In this paper, we study the spectral radius of some S-essential spectra of a bounded linear operator defined on a Banach space. More precisely, via the concept of measure of noncompactness,we show that for any two bounded linear operators $T$ and $S ...
C. Belabbaci
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Decomposing the essential spectrum
Journal of Functional Analysis, 2009 We use C*-algebra theory to provide a new method of decomposing the eseential spectra of self-adjoint and non-self-adjoint Schrodinger operators in one or more space dimensions.
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Targeting an Essential GTPase Obg for the Development of Broad-Spectrum Antibiotics. [PDF]
PLoS ONE, 2016 A promising new drug target for the development of novel broad-spectrum antibiotics is the highly conserved small GTPase Obg (YhbZ, CgtA), a protein essential for the survival of all bacteria including Neisseria gonorrhoeae (GC).
Josephine A Bonventre +3 more
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Molecules, 2023 Oregano and marjoram are important aromatic spices in the food industry, as well as medicinal plants with remarkable antioxidant properties. Despite their popularity, little is known about treatments that would influence the antioxidant capacity of ...
Danial Sarfaraz +5 more
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The Essential Spectrum of the Essentially Isometric Operator
Canadian Mathematical Bulletin, 2014 AbstractLet T be a contraction on a complex, separable, infinite dimensional Hilbert space and let σ(T) (resp. σe(T)) be its spectrum (resp. essential spectrum). We assume that T is an essentially isometric operator; that is, IH -T*T is compact. We show that if D\σ(T) ≠ Ø, then for every f from the disc-algebraσe(f(T)) = f(σe(T))where D is the open ...
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The Essential Spectrum of Advective Equations [PDF]
Communications in Mathematical Physics, 2006 A description of the essential spectrum is given for a general class of linear advective PDE with pseudodifferential bounded perturbation. We prove that every point in the Sacker-Sell spectrum of the corresponding bicharacteristic-amplitude system exponentiates into the spectrum of PDE. Exact spectral pictures are found in various cases.
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Essential Spectrum and Feller Type Properties
Integral Equations and Operator Theory, 2023 AbstractWe give necessary and sufficient conditions for a regular semi-Dirichlet form to enjoy a new Feller type property, which we call weak Feller property. Our characterization involves potential theoretic as well as probabilistic aspects and seems to be new even in the symmetric case. As a consequence, in the symmetric case, we obtain a new variant
Ben Amor, Ali +2 more
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