3 papers
math.FA2025
Structural properties of 2-C-normal operators
Messaoud Guesba, Ismail Lakehal, Sid Ahmed Ould Ahmed Mahmoud
In this paper, we introduce and study a new class of bounded linear operators on complex Hilbert spaces, which we call 2-C-normal operators. This class is inspired by and closely r…
math.FA2025
A new seminorm of -tuple operators and its applications
Pintu Bhunia, Messaoud Guesba
We introduce a new seminorm of -tuple operators, which generalizes the -Euclidean operator radius of -tuple bounded linear operators on a complex Hilbert space. We introdu…
math.FA2024
-Davis-Wielandt Radius Bounds of Semi-Hilbertian Space Operators
Messaoud Guesba, Somdatta Barik, Pintu Bhunia +1
Consider is a complex Hilbert space and is a positive operator on The mapping $\langle\cdot,\cdot\rangle_A: \mathcal{H}\times \mathcal{H} \to \math…