6 papers
One-sided generalized Drazin-Riesz and one-sided generalized Drazin-meromorphic invertible operators
Snežana Č. Živković-Zlatanović
The aim of this paper is to introduce and study left and right versions of the class of generalized Drazin-Riesz invertible operators, as well as left and right versions of the cla…
New properties of some classes of Saphar type operators
Ayoub Ghorbel, Snežana Č. Živković-Zlatanović
This paper explores additional properties of some classes of Saphar type operators, namely left Drazin invertible, essentially left Drazin invertible, right Drazin invertible, and…
Toplogical uniform descent, quasi-Fredholmness and operators originated from semi-B-Fredholm theory
Snežana Č. Živković-Zlatanović, Mohammed Berkani
In this paper we study operators originated from semi-B-Fredholm theory and as a consequence we get some results regarding boundaries and connected hulls of the corresponding spect…
Generalized Kato-Riesz decomposition
Snežana Č. Živković-Zlatanović, Miloš D. Cvetković
We shall say that a bounded linear operator acting on a Banach space admits a generalized Kato-Riesz decomposition if there exists a pair of -invariant closed subspaces…
Generalized Kato decomposition and essential spectra
Miloš D. Cvetković, Snežana Č. Živković-Zlatanović
Let denote any of the following classes: upper (lower) semi-Fredholm operators, Fredholm operators, upper (lower) semi-Weyl operators, Weyl operators, upper (lower) semi-…
Generalized B-Fredholm Banach algebra elements
Milos D. Cvetkovic, Enrico Boasso, Snezana C. Zivkovic-Zlatanovic
Given a (not necessarily continuous) homomorphism between Banach algebras $\T\colon\A\to\B$, an element $a\in\A$ will be said to be B-Fredholm (respectively generalized B-Fredholm)…