192 citations · 640 across the 16 of their papers we have counts for
17 papers
Solutions of a class of nonlinear matrix equations
Samik Pakhira, Snehasish Bose, Sk Monowar Hossein
In this article we present several necessary and sufficient conditions for the existence of Hermitian positive definite solutions of nonlinear matrix equations of the form $X^s + A…
J-fusion frame operator for Krein spaces
Shibashis Karmakar
In this article we find a necessary and sufficient condition under which a given collection of subspace is a -fusion frame for a Krein space . We also approximate $J…
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…
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…
Neutron Stars : A Comparative Study
Mehedi Kalam, Sk. Monowar Hossein, Sajahan Molla
The inner structure of neutron star is considered from theoretical point of view and is compared with the observed data. We have proposed a form of an equation of state relating pr…
Isotropic star in low-mass X-ray binaries and X-ray pulsars
Mehedi Kalam, Sk. Monowar Hossein, Sajahan Molla
We present a model for compact stars in the low mass X-ray binaries(LMXBs) and X-ray pulsars using a metric given by John J. Matese and Patrick G. Whitman \citep{Matese and Whitman…
Compact Stars in low-mass X-ray binaries
Sk. Monowar Hossein, Sajahan Molla, Md. Abdul Kayum Jafry +1
We propose a model for compact stars in low-mass X-ray binaries(LMXBs) namely KS 1731-260, EXO 1745-248 and 4U 1608-52. Here we investigate the physical phenomena of a compact star…
Frames on Krein Spaces
Shibashis Karmakar, Sk Monowar Hossein
In this article we define frame for a Krein space K with a J-orthonormal basis and extend the notion of frame sequence and frame potential analogous to Hilbert spaces.We show that…
Fixed point theorems for weak contraction in partially ordered G-metric space
Snehasish Bose, Sk Monowar Hossein
In this article, we present some fixed point theorems in partially ordered G-metric space using the concept of - weak contraction which extend many existing fixed point theo…
Analytical model of strange star in the low-mass X-ray binary 4U 1820-30
Mehedi Kalam, Farook Rahaman, Sajahan Molla +2
In this article, we have proposed a model for a realistic strange star under Tolman VII metric\citep{Tolman1939}. Here the field equations are reduced to a system of three algebrai…
Anisotropic Quintessence stars
Mehedi Kalam, Farook Rahaman, Sajahan Molla +1
We propose a relativistic model for quintessence stars with the combination of an anisotropic pressure corresponding to normal matter and a quintessence dark energy having a charac…
Galactic rotation curves and strange quark matter with observational constraints
Mehedi Kalam, Farook Rahaman, Sk. Monowar Hossein +1
We obtain the space time of the galactic core in the framework of general relativity by taking the flat rotational curve as input and considering the matter content in the galactic…
Geodesic study of a charged black hole
Mehedi Kalam, Nur Farhad, Sk. Monowar Hossein
The behavior of the timelike and null geodesics of charged E. Ayn-Beato and A. Garcia (ABG) black hole are investigated. For circular and radial geodesics, we investigat…
A relativistic model for Strange Quark Star
Mehedi Kalam, Anisul Ain Usmani, Farook Rahaman +3
We propose a spherically symmetric and anisotropic model for strange quark stars within the framework of MIT Bag model. Though the model is found to comply with all the physical re…
Anisotropic Compact stars with variable cosmological constant
Sk. Monowar Hossein, Farook Rahaman, Jayanta Naskar +2
Recently the small value of the cosmological constant and its ability to accelerate the expansion of the Universe is of great interest. We discuss the possibility of forming of ani…
Anisotropic strange star with de Sitter spacetime
Mehedi Kalam, Farook Rahaman, Saibal Ray +3
Stars can be treated as self-gravitating fluid. Krori and Barua (1975) gave an analytical solutions to that kind of fluids. In this connection, we propose a de-Sitter model for an…