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Spectral properties of upper triangular block operators. (English) Zbl 1105.47005
Summary: We describe local spectral properties of upper triangular block operators having a diagonal that satisfies the single valued extension property together with its adjoint. Some results on $$n$$-normal operators and Jordan operators are recaptured.

##### MSC:
 47A11 Local spectral properties of linear operators 47A10 Spectrum, resolvent