Corrigendum and addendum: "On the axiomatic theory of spectrum II"
J. Koliha, M. Mbekhta, V. Müller, Pak Poon (1998)
Studia Mathematica
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The main purpose of this paper is to correct the proof of Theorem 15 of [4], concerned with the stability of the class of quasi-Fredholm operators under finite rank perturbations, and to answer some open questions raised there.