Results 1 to 10 of about 52 (52)
Study of the property (bz) using local spectral theory methods
Arab Journal of Basic and Applied Sciences, 2023 For a bounded linear operator, by local spectral theory methods, we study the property [Formula: see text] which means that the difference of the approximate point spectrum with the upper semi-Fredholm spectrum coincides with the set of all finite-range ...
Elvis Aponte, Jose Soto, Ennis Rosas
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Limit points for descent spectrum of operator matrices
Moroccan Journal of Pure and Applied Analysis, 2022 In this paper, we investigate the limit points set of descent spectrum of upper triangular operator matrices MC=(AC0B){M_C} = \left( {\matrix{A \hfill & C \hfill \cr 0 \hfill & B \hfill \cr } } \right).
Boua H., Karmouni M., Tajmouati A.
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Spectral Theory For Strongly Continuous Cosine
Concrete Operators, 2021 Let (C(t))t∈ℝ be a strongly continuous cosine family and A be its infinitesimal generator. In this work, we prove that, if C(t) – cosh λt is semi-Fredholm (resp.
Boua Hamid
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On (m, P)-expansive operators: products, perturbation by nilpotents, Drazin invertibility
Concrete Operators, 2021 A generalisation of m-expansive Hilbert space operators T ∈ B(ℋ) [18, 20] to Banach space operators T ∈ B(𝒳) is obtained by defining that a pair of operators A, B ∈ B(𝒳) is (m, P)-expansive for some operator P ∈ B(𝒳) if Δ A,Bm(P)= (I-LARB)m(P)=∑j=0m(-1)j(
Duggal B.P.
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On new strong versions of Browder type theorems
Open Mathematics, 2018 An operator T acting on a Banach space X satisfies the property (UWΠ) if σa(T)∖ σSF+−$\begin{array}{} \sigma_{SF_{+}^{-}} \end{array} $(T) = Π(T), where σa(T) is the approximate point spectrum of T, σSF+−$\begin{array}{} \sigma_{SF_{+}^{-}} \end{array} $
Sanabria José +4 more
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Properties of m-complex symmetric operators
, 2017 In this paper, we study several properties of m-complex symmetric operators. In particular, we prove that if T ∈ L(H) is an m-complex symmetric operator and N is a nilpotent operator of order n > 2 with TN = NT , then T +N is a (2n+m−2)-complex ...
KO, Eungil, LEE, Ji Eun, CHŌ, Muneo
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Survey of India Topo sheet 47A11 & 47A15 1971 1st edition
, 1971 Survey of India Topo sheet 47/A11 & 47/A15 1971 1st ...
Survey of India
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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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Early warning signs for SPDEs with continuous spectrum
European Journal of Applied MathematicsIn this work, we study early warning signs for stochastic partial differential equations (SPDEs), where the linearisation around a steady state is characterised by continuous spectrum. The studied warning sign takes the form of qualitative changes in the
Paolo Bernuzzi +2 more
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, 2023 La Presidencia de la República de Colombia (2016) mediante el Decreto 036 define el contrato sindical como un acuerdo entre uno o varios sindicatos de trabajadores con uno o varios empleadores para la prestación de servicios o la ejecución de trabajos ...
Castro Barrero, Karen Yised +1 more
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