Some spectral domain in approximate point-spectrum-preserving maps on B ( X ) $\mathcal {B}(\mathcal {X})$
Abstract Let X $\mathcal {X}$ be an infinite-dimensional complex Banach space, B ( X ) $\mathcal {B}(\mathcal {X})$ the algebra of all bounded linear operators on X $\mathcal {X}$ . Denote the spectral domain by σ γ ( T ) = { λ ∈ σ a ( T ) : T that is semi-Fredholm and a s c ( T − λ I ) < ∞ } $...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-08-01
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| Series: | Journal of Inequalities and Applications |
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| Online Access: | https://doi.org/10.1186/s13660-023-03014-z |