Results 31 to 40 of about 4,674,369 (143)
Essential spectra of weighted composition operators with hyperbolic symbols
Concrete Operators, 2015 In this paperwe study both the spectra and the essential spectra ofweighted composition operators on Hardy spaces Hp(ⅅ), standard weighted Bergman spaces Apα(ⅅ) and weighted H∞1-type spaces when the symbols are of hyperbolic ...
Hyvärinen Olli, Nieminen Ilmari
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, 1982 Volume 4, Number 1 of Spectrum literary journalhttps://nwcommons.nwciowa.edu/spectrum/1006/thumbnail ...
Spectrum Contributors,
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Weyl-Type Theorems of Upper Triangular Relation Matrices
MathematicsThe spectral theory of operator matrices has several applications in elasticity, quantum mechanics, fluid dynamics, and other fields of mathematical physics.
Yanyan Du, Junjie Huang
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On Effectiveness of Hopping-Based Spread Spectrum Techniques for Network Forensic Traceback [PDF]
International Journal of Networked and Distributed Computing (IJNDC), 2013 Network-based crime has been increasing in both extent and severity and network-based forensics encapsulates an essential part of legal surveillance. A key network forensics tool is traceback that can be used to identify true sources of suspects.
Wei Yu +6 more
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Antibiotics, 2022 It is urgent to find new antibiotic classes against multidrug-resistant bacteria as the rate of discovery of new classes of antibiotics has been very slow in the last 50 years.
Pietro Picconi +3 more
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A Nonlinear Schrödinger Equation Resonating at an Essential Spectrum
Advances in Mathematical Physics, 2016 We consider the nonlinear Schrödinger equation -Δu+f(u)=V(x)u in RN. The potential function V satisfies that the essential spectrum of the Schrödinger operator -Δ-V is [0,+∞) and this Schrödinger operator has infinitely many negative eigenvalues ...
Shaowei Chen, Haijun Zhou
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Jaw Tremor Resulting in Broken Teeth: On the Essential Tremor Spectrum
Tremor and Other Hyperkinetic Movements, 2015 Background: Jaw tremors in essential tremor (ET) rarely represent anything other than a cosmetic concern. Phenomenology Shown: A case of an ET patient whose jaw tremor was severe enough to result in cracked teeth.
Nora C. Hernandez, Elan D. Louis
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The -Jeribi essential spectrum
Ukrains’kyi Matematychnyi Zhurnal, 2021 UDC 517.9We study some properties and results on the -Jeribi essential spectrum of linear bounded operators on a Banach space. In particular, we give some criteria for coincidence of this spectrum for two linear operators and the relation of this type of spectrum with the well-known -Schechter essential spectrum.
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On the Essential Spectrum of Schrödinger Operators on Trees [PDF]
Mathematical Physics, Analysis and Geometry, 2018 It is known that the essential spectrum of a Schrödinger operator $H$ on $\ell^{2}\left(\mathbb{N}\right)$ is equal to the union of the spectra of right limits of $H$. The natural generalization of this relation to $\mathbb{Z}^{n}$ is known to hold as well.
Jonathan Breuer +2 more
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Quantum systems at the brink: existence of bound states, critical potentials, and dimensionality
Forum of Mathematics, Sigma, 2023 One of the crucial properties of a quantum system is the existence of bound states. While the existence of eigenvalues below zero, that is, below the essential spectrum, is well understood, the situation of zero energy bound states at the edge of the ...
Dirk Hundertmark +2 more
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