Results 31 to 40 of about 541,953 (330)
Perturbation Results on Semi-Fredholm Operators and Applications
Journal of Inequalities and Applications, 2009 We give some results concerning stability in the Fredholm operators and Browder operators set, via the concept of measure of noncompactness. Moreover, we prove some localization results on the essential spectra of bounded operators on Banach space.
Boulbeba Abdelmoumen, Hamadi Baklouti
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t-Entropy formulae for concrete classes of transfer operators
Журнал Белорусского государственного университета: Математика, информатика, 2019 t-Entropy is a principal object of the spectral theory of operators, generated by dynamical systems, namely, weighted shift operators and transfer operators.
Krzysztof Bardadyn +3 more
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A Direct Version of Veldman's Proof of Open Induction on Cantor Space via Delimited Control Operators [PDF]
, 2014 First, we reconstruct Wim Veldman's result that Open Induction on Cantor space can be derived from Double-negation Shift and Markov's Principle. In doing this, we notice that one has to use a countable choice axiom in the proof and that Markov's ...
Ilik, Danko, Nakata, Keiko
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Commutator Anomaly in Noncommutative Quantum Mechanics
, 2005 In this letter, firstly, the Schr$\ddot{o}$dinger equation on noncommutative phase space is given by using a generalized Bopp's shift. Then the anomaly term of commutator of arbitrary physical observable operators on noncommutative phase space is ...
Ardalan F. +10 more
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Bounds on the spectral shift function and the density of states
, 2004 We study spectra of Schr\"odinger operators on $\RR^d$. First we consider a pair of operators which differ by a compactly supported potential, as well as the corresponding semigroups.
Hundertmark, Dirk +4 more
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A note on positive $\mathcal{AN}$ operators
, 2018 We show that positive absolutely norm attaining operators can be characterized by a simple property of their spectra. This result clarifies and simplifies a result of Ramesh. As an application we characterize weighted shift operators which are absolutely
Doust, Ian
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The Change of the Supervision of the Activities of Economic Operators
Teisė, 2021 The present article analyses the essence and purpose of the supervision of the activities of economic operators as a field of public administration, as well as its expression and evaluation in national administrative law.
Eimantė Šilvaitė
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Quantum Phase Estimation with Arbitrary Constant-precision Phase Shift Operators [PDF]
, 2011 While Quantum phase estimation (QPE) is at the core of many quantum algorithms known to date, its physical implementation (algorithms based on quantum Fourier transform (QFT)) is highly constrained by the requirement of high-precision controlled phase ...
Ahmadi, Hamed, Chiang, Chen-Fu
core
, 1996 The exactly solvable eigenproblems in Schr\"odinger quantum mechanics typically involve the differential "shift operators". In the standard supersymmetric (SUSY) case, the shift operator turns out to be of first order. In this work, I discuss a technique
C., David J. Fernandez
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd +3 more
wiley +1 more source