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Some improvements of numerical radius inequalities of operators and operator matrices
Pintu Bhunia, Kallol Paul
We obtain upper bounds for the numerical radius of a product of Hilbert space operators which improve on the existing upper bounds. We generalize the numerical radius inequalities…
On inequalities for A-numerical radius of operators
Pintu Bhunia, Kallol Paul, Raj Kumar Nayak
Let be a positive operator on a complex Hilbert space We present inequalities concerning upper and lower bounds for -numerical radius of operators, which impr…
Sharp inequalities for the numerical radius of Hilbert space operators and operator matrices
Pintu Bhunia, Kallol Paul, Raj kumar Nayak
We present new upper and lower bounds for the numerical radius of a bounded linear operator defined on a complex Hilbert space, which improve on the existing bounds. Among many oth…
Bounds for zeros of a polynomial using numerical radius of Hilbertian space operators
Pintu Bhunia, Santanu Bag, Kallol Paul
We obtain bounds for the numerical radius of operator matrices which improve on the existing bounds. We also show that the inequalities obtained here generalize the ex…
Bounds of numerical radius of bounded linear operator using -Aluthge transform
Santanu bag, Pintu Bhunia, Kallol Paul
We develop a number of inequalities to obtain bounds for the numerical radius of a bounded linear operator defined on a complex Hilbert space using the properties of -Aluthge tr…
Numerical radius inequalities and its applications in estimation of zeros of polynomials
Pintu Bhunia, Santanu Bag, Kallol Paul
We present some upper and lower bounds for the numerical radius of a bounded linear operator defined on complex Hilbert space, which improves on the existing upper and lower bounds…
Numerical radius inequalities of operator matrices with applications
Pintu Bhunia, Santanu Bag, Kallol Paul
We present upper and lower bounds for the numerical radius of operator matrices which improves on the existing bound for the same. As an application of the results obt…