2008
DOI: 10.1007/s10114-007-6339-x
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Browder spectra and essential spectra of operator matrices

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Cited by 15 publications
(5 citation statements)
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“…If there exists a non-zero complex polynomial P (z) such that P (T ) is Riesz then we say that T ∈ B(X) is polynomially Riesz, these operators have been discussed in [6] and [10]. It is useful to mention that for T ∈ B(X) and (M, N ) ∈ Red(T ) ( [10], [12]):…”
Section: Introductionmentioning
confidence: 99%
“…If there exists a non-zero complex polynomial P (z) such that P (T ) is Riesz then we say that T ∈ B(X) is polynomially Riesz, these operators have been discussed in [6] and [10]. It is useful to mention that for T ∈ B(X) and (M, N ) ∈ Red(T ) ( [10], [12]):…”
Section: Introductionmentioning
confidence: 99%
“…(1.1) defined on the separable Hilbert space H ⊕ K. Recall that the problem of the relationship between the spectrum, various distinguished parts of the spectrum of an upper triangular and Drazin invertibility and its diagonal has been considered by a number of authors in the recent past, we can see [4,5,13,21,22,[28][29][30] and the references therein for recent reviews on this topic. A related, and seemingly more demanding, problem is the following.…”
Section: Introductionmentioning
confidence: 99%
“…In [16], authors investigate the filling-in-holes problem of 2 × 2 upper triangular operator matrices for Browder spectrum, they showed the following theorem.…”
Section: Introductionmentioning
confidence: 99%