3 papers
math.FA2026
Posinormality and the Root Problem
C. S. Kubrusly, H. M Stankovic
The paper extends three results regarding the nth root problem by embedding classes of Hilbert-space operators into the class of posinormal operators. For instance, it is shown tha…
math.FA2025
On roots of normal operators and extensions of Ando's Theorem
Hranislav StankoviÄ, Carlos Kubrusly
In this paper, we extend Ando's theorem on paranormal operators, which states that if is a paranormal operator and there exists $ n \in \mathbb{…
math.FA2025
Spherically quasinormal tuples: -th root problem and hereditary properties
Hranislav StankoviÄ
In this paper, we provide several characterizations of a spherically quasinormal tuple in terms of its normal extension, as well as in terms of powers of the associate…