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- W4234019612 abstract "It is shown that for each closed subset $Omega$ of the semi-Fredholm domain of a bounded linear operator $T$ acting in a complex Hilbert space $H$ there exists a subspace of a finite codimension in $H$ such that the compression of $T - lambda$ to this subspace is a left- or right-invertible operator for all $lambda$ in $Omega$. From this result we obtain a characterization of the Weyl spectrum of $T$." @default.
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- W4234019612 date "1984-10-01" @default.
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- W4234019612 title "A Characterization of the Weyl Spectrum" @default.
- W4234019612 doi "https://doi.org/10.2307/2045188" @default.
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