29 citations · 142 across the 21 of their papers we have counts for
4 papers · 1 filter
On joint numerical radius of operators and joint numerical index of a Banach space
Arpita Mal
Generalizing the notion of numerical range and numerical radius of an operator on a Banach space, we introduce the notion of joint numerical range and joint numerical radius of tup…
Numerical radius norm and extreme contractions of
Arpita Mal
Suppose is the space of all bounded linear operators on a complex Hilbert space This article deals with the problem of characterizing the extreme contractions of …
An approximation problem in the space of bounded operators
Arpita Mal
For Banach spaces we consider a distance problem in the space of bounded linear operators Motivated by a recent paper \cite{RAO21}, we obtain sufficient…
Extreme points of the unit ball of and best approximation in
Arpita Mal
We study the geometry of the space of all bounded linear operators on a Banach space endowed with the numerical radius norm, whenever the numerical radius…