Generalized Drazin-type spectra of Operator matrices

A. Tajmouati, M. Abkari, M. Karmouni


In this paper, we investigate the limit points set of surjective and approximate point spectra of upper triangular operator matrices . We prove that σ*(MC) ∪ W=σ*(

Palabras clave

Surjective spectrum; approximate point spectrum; generalized Drazin spectrum; Single-valued extension property; operator matrices.

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