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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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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Fixed Point in Non-Archimedeant T -Banach Spaces
In this paper, we introduce the concept of T -normed space in a non-Archimedean space, which is called a non-Archimedean T -normed space and give some properties.
TALLAB , ABDELHAMID +2 more
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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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The Resolvent of Impulsive Singular Hahn–Sturm–Liouville Operators
Annales Mathematicae SilesianaeIn this study, the resolvent of the impulsive singular Hahn–Sturm– Liouville operator is considered. An integral representation for the resolvent of this operator is obtained.
Allahverdiev Bilender P. +2 more
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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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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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Surjective isometries of C*-algebras: complex spectrum and periodicity
Concrete OperatorsIn this paper, we are interested in studying surjective isometries of C*-algebras with an emphasis on their complex spectrum. We do not require the isometries to be linear nor the C*-algebras to be unital.
Bénéteau Catherine +6 more
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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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