Sharp bounds for the Berezin number of $$2\times 2$$ operator matrices with applications
Messaoud Guesba, Cristian Conde
31
Productions
185
Citations
9
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2025
Weighted Hilbert-Schmidt Numerical Radius Inequalities for $$2\times 2$$ Operator Matrices
Messaoud Guesba, Fuad Kıttaneh
Weighted Berezin number inequalities for $$2\times 2$$ operator matrices
Messaoud Guesba, Somdatta Barik, Kallol Paul
On A-numerical radius inequalities of semi-Hilbert space operators
Messaoud Guesba, Mohammad Sababheh
The notion of $$\infty $$-invertibility and $$\infty $$-isometric operators
On the classes of $n$-Nadir's and $n^*$-Nadir's operators on Hilbert spaces
A. Smati, Messaoud Guesba
A new generalization of the class of $$m-$$symmetric operators
Further Berezin Number and Berezin Norm Inequalities for Sums and Products of Operators
Messaoud Guesba, Somdatta Barik, Kallol Paul
Some results on polynomially Drazin normal operators
Sid Ahmed Ould Ahmed Mahmoud, Messaoud Guesba, Naeem Ahmad
Bounds for the Berezin number inequalities of 2 × 2 operator matrices and applications
Messaoud Guesba, Mubariz T. Garayev
2024
A-Davis–Wielandt Radius Bounds of Semi-Hilbertian Space Operators
Messaoud Guesba, Somdatta Barik, Pintu Bhunia, Kallol Paul
Some New Berezin Number Inequalities for $$2\times 2$$ Operator Matrices
Messaoud Guesba, Fuad Kıttaneh, Ulaş Yamanc
Estimates for the Berezin number inequalities
Messaoud Guesba, Mübariz Garayev
Daugavet’s equation and Jordan elementary operators
Zakaria Taki, Mohamed Chraïbi Kaadoud, Messaoud Guesba
Berezin Number Inequalities for Sums and Products of Operators and Applications
Messaoud Guesba, Fuad Kıttaneh
On the (α, β)-Euclidean operator radius and its applications
Messaoud Guesba, Sid Ahmed Ould Ahmed Mahmoud
A-Numerical Radius of Semi-Hilbert Space Operators
Messaoud Guesba, Pintu Bhunia, Kallol Paul
2023
FURTHER BEREZIN NUMBER INEQUALITIES OF OPERATOR MATRICES
Messaoud Guesba, Ulaş Yamancı
Refinements of some inequalities involving Berezin norms and Berezin number and related questions
Mübariz Garayev, Messaoud Guesba
On a class of Drazin invertible operators for which $$\left( S^{*}\right) ^{2}\left( S^{D}\right) ^{2}=\left( S^{*}S^{D}\right) ^{2}$$
Messaoud Guesba, Sid Ahmed Ould Ahmed Mahmoud