Corrigendum and addendum: "On the axiomatic theory of spectrum II"
Volume 130 / 1998
Fundamenta Mathematicae 130 (1998), 193-198
DOI: 10.4064/sm_1998_130_2_1_193_198
Abstract
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.
