Results 71 to 80 of about 147 (142)
Properties of absolute-∗-k-paranormal operators and contractions for ∗-A(k) operators
, 2019 First, we see if T is absolute-∗-k-paranormal for k ≥ 1, then T is a normaloid operator. We also see some properties of absolute-∗-k-paranormal operator and ∗-A(k) operator.
BRAHA, Naim L., HOXHA, Ilmi, TATO, Agron
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, 2002 We prove some spectral inclusions for strongly continuous semigroups. Some sta-bility results are also established. 2000 Mathematics Subject Classification: 47D03, 47A10. 1. Introduction and preliminaries.
Abdelkader Elkoutri, Mohamed Aziz Taoudi
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Spectral points of type π+ and type π- of closed operators in indefinite inner product spaces [PDF]
, 2014 We introduce the notion of spectral points of type π+ and type π− of closed operators A in a Hilbert space which is equipped with an indefinite inner product. It is shown that these points are stable under compact perturbations.
Trunk, Carsten, Philipp, Friedrich
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, 2009 In this work, we find some asymptotic formulas for the number N(ε)of eigenvalues smaller than −ε (ε > 0) of a self adjoint operator Lwhich is formed by differential expression(Ly)(x) = −(p(x)y(x)) − Q(x)y(x)and with the boundary conditiony(0) = 0as ε →
Adıgüzelov, Ehliman, Karayel, Serpil
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Expansion of eigenvalues of the perturbed discrete bilaplacian. [PDF]
Mon Hefte Math, 2022 Kholmatov SY +2 more
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On the iterates of Jackson type operator GS,N in Hilbert space
, 2019 In this paper we study the limit of the iterates of Jackson type operator. Our results continue the works of Badea [2] and Nagler et al. [9, 10]. The proofs are based on spectral theory of linear operators and are performed at first for Hilbert space and
Zapryanova, T, Souroujon, D
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Browder and Weyl spectra of upper triangular operator matrices
, 2010 Let MC = (A/0 C/B) ( B(X ( X ) be an upper triangulat Banach space operator. The relationship between the spectra of MC and M0, and their various distinguished parts, has been studied by a large number of authors in the recent past.
B.P. Duggal
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Well-posedness and stability analysis of an epidemic model with infection age and spatial diffusion. [PDF]
J Math Biol, 2023 Walker C.
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Operator-norm homogenisation estimates for the system of Maxwell equations on periodic singular structures. [PDF]
Calc Var Partial Differ Equ, 2022 Cherednichenko K, D'Onofrio S.
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A Lower Bound for the Differences of Powers of Linear Operators
, 2008 Let T be a bounded linear operator in a Banach space, with σ(T) = {1}. In 1983, Esterle–Berkani ’ s conjecture was proposed for the decay of differences (I − T) T n as follows: Either lim infn→ ∞ (n + 1) (I − T) T n ≥ 1/e or T = I.
V. Turunen +3 more
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