64 citations · 883 across the 94 of their papers we have counts for
6 papers · 2 filters
Properties of J-fusion frames in Krein space
Shibashis Karmakar, Sk. Monowar Hossein, Kallol Paul
In this paper we characterize -1-uniform -Parseval fusion frames in a Krein space . We provide a few results regarding construction of new -tight fusion…
On Symmetry of Birkhoff-James Orthogonality of Linear Operators on Finite-dimensional Real Banach Spaces
Debmalya Sain, Puja Ghosh, Kallol Paul
We characterize left symmetric linear operators on a finite dimensional strictly convex and smooth real normed linear space which answers a question raised recently…
Tight J-frames in Krein space and the associated J-frame potential
Sk. Monowar Hossein, Shibashis Karmakar, Kallol Paul
Motivated by the idea of -frame for a Krein space , introduced by Giribet \textit{et al.} (J. I. Giribet, A. Maestripieri, F. Martínez Pería, P. G. Massey,…
J-Frame Sequences in Krein Space
Shibashis Karmakar, SK. Monowar Hossein, Kallol Paul
Let be a -frame for a Krein space and be a -orthogonal projection from onto a subspace . In…
Chebyshev centers that are not farthest points
Debmalya Sain, Vladimir Kadets, Kallol Paul +1
In this paper we address the question whether in a given Banach space, a Chebyshev center of a nonempty bounded subset can be a farthest point of the set. Our exploration reveals t…
Farthest point problem and M-compact sets
D. Sain, K. Paul, A. Ray
In this paper we give an elementary proof of the fact that every uniquely remotal set is singleton in a finite dimensional strictly convex normed linear space. We show that if A is…