31 citations · 36 across the 29 of their papers we have counts for
31 papers
Nuclear Weighted composition operators between different -spaces
S. Al Ghafri, Y. Estaremi, S. Shamsigamchi
We provide complete characterisations of nuclear weighted composition operators between two distinct -spaces, where . As a consequence, when the underlying…
Nuclear weighted conditional expectation operators
A. Ommi, Y. Estaremi
We provide a characterisations of nuclear weighted conditional expectation operators between different -spaces. As a consequence, when the underlying measure space is non-a…
Unbounded composition operators on Orlicz spaces
M. Namdar Baboli, Y. Estaremi
In this paper we deal with unbounded composition operators defined in Orlicz spaces. Indeed, we provide some necessary and sufficient condition for densely definedness of compositi…
Li-Yorke chaos for composition operators on Orlicz spaces
Yousef Estaremi
In this paper we characterize Li-Yorke chaotic composition operators on Orlicz spaces. Indeed some necessary and suffcient conditions are provided for Li-Yorke chaotic composition…
Hyperbolic composition operators on Orlicz spaces
Yousef Estaremi
In the present paper we provide some equivalent conditions for composition operators to have shadowing property on Orlicz space. Also, we obtain that for the composition operators…
Composition operators on Harmonic Bloch-type spaces
Y. Estaremi, A. Ebadian, S. Esmaeili
In this paper we consider composition operators on Harmonic-Bloch type spaces and we compute the spectrum of composition operators. Also, we characterize isometric composition oper…
Moore-Penrose inverse and applications to linear equations
Yousef Estaremi, Saeedeh Shamsi
In the present paper we investigate Moore-Penrose inverse and characteristic matrix of unbounded WCT operators on the Hilbert space . Also, we obtain some applications of t…
Type-zero ternary corners
Yousef Estaremi, Martin Mathieu
In this paper we discuss the relationship between a TRO and a sub-TRO that is the range of a TRO-conditional expectation on , a \textit{ter…
Composition operators on the spaces of Harmonic Bloch functions
Y. Estaremi, S. Esmaili, A. Ebadian
In this paper we characterize some basic properties of composition operators on the spaces of harmonic Bloch functions. First we provide some equivalent conditions for boundedness…
Conditional Carleson measures and related operators on Bergman spaces
A. Aliyan, Y. Estaremi, A. Ebadian
In this paper first we define generalized Carleson mea- sure. Then we consider a special case of it, named conditional Carleson measure on the Bergman spaces. After that we give a…
The ascent and descent of weighted conditional expectation operators
Yousef Estaremi
In this paper we prove that the ascent of a weighted conditional expectation operator of the form of on -spaces is always finite and is equal to 2. Also we get that…
Reducibility of WCE operators on
Yousef Estaremi
In this paper we characterize the closed subspaces of that reduce the operators of the form , in which is a - subalgebra of…
Spectral radius algebras of wce operators
Yousef Estaremi, Mohammad Reza Jabbarzadeh
In this paper, we investigate the spectral radius al- gebras related to the weighted conditional expectation operators on the Hilbert spaces L2(F). We give a large classes of opera…
Unbounded weighted conditional type operators on L^p spaces
Yousef Estaremi
In this paper we consider unbounded weighted conditional type operators on the space Lp, we give some conditions under which they are densely defined and we obtain a dense subset o…
On properties of multiplication and composition operators between Orlicz spaces
Y. Estaremi, S. Maghsodi, I. Rahmani
In this paper, we study bounded and closed range multiplication and composition operators between two different Orlicz spaces.
Weighted conditional type operators between different Orlicz spaces
Yousef Estaremi
In this note we consider weighted conditional type operators between different Orlicz spaces and generalized conditional type Holder inequality that we defined in [2]. Then we give…
Paranormal weighted conditional type operators
Yousef Estaremi
In this paper, some sub-classes of paranormal weighted conditional expectation type operators, such as *-paranormal, quasi-*-paranormal and (n; k)-quasi-*-paranormal weighted condi…
Unbounded weighted conditional expectation operators
Yousef Estaremi
In this note basic properties of unbounded weighted conditional expectation operators are investigated. A description of polar decomposition and quasinormality in this context are…
Fredholm multiplication conditional type operators on L^p-spaces
Yousef Estaremi
In this paper, first we investigate closed range multiplication conditional type operators between two Lp-spaces. Then we characterize Fredholm ones when the underlying measure spa…
Hyperexpansive weighted composition operators
Yousef Estaremi
In this note unbounded hyperexpansive weighted composition operators are investigated. AS a consequence unbounded hyperexpansive multiplication and composition operators are charac…
Substitution operators on the space of formal power series with a weighted cauchy product
Yousef Estaremi, Mohammad Reza Jabbarzadeh
Boundedness of -substitution operator on , with a weighted Cauchy product , is investigated by an inductive argument on the pair $(…
A class of operators with normal Aluthge transformation
Yousef Estaremi
In this paper, we show that the generalized Aluthge transforma- tions of a large class of operators (weighted conditional type operators) are normal. As a consequence, the operator…
The spectra of weighted conditional type operators
Yousef Estaremi
In this paper, the spectrum, residual spectrum, point spectrum and spectral radius of weighted conditional type operators are computed. As an application, we give an equivalent con…
Compact Lambert Type Operators Between Two l^p Spaces
Yousef Estaremi, Mohammadreza Jabbarzadeh
In this paper we investigate compactness of weighted Lambert type operators between two Lp spaces