31 citations · 36 across the 29 of their papers we have counts for
13 papers · 1 filter
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
Multiplication Conditional Expectation Type Operators On Orlicz Spaces
Yousef Estaremi
In this paper we consider a generalized conditional-type Holder- inequality and investigate some classic properties of multiplication conditional expectation type operators on Orli…
Centered weighted conditional type operators
Yousef Estaremi
In this paper, we give some necessary and sufficient conditions for weighted conditional expectation type operators on L2 to be centered. Also, we investigate the relation between…
Decompositions of Weighted Conditional Expectation Type Operators
Yousef Estaremi
In this paper we investigate boundedness, polar decomposition and spectral decomposition of weighted conditional expectation type operators on L^2(Σ).
Some classes of weighted conditional type operators and their spectra
Yousef Estaremi
In this paper, some ?-classes of weighted conditional expectation type operators, such as A-class, ?-A-class and quasi-?-A classes on L2(?) are investigated. Also, the spectrum, po…
Fixed point of subadditive maps and some non-linear integral equations
Yousef Estaremi, Bahman Moeini
In this paper, first some results of [5] are extended for subadditive separating maps between C(X;E) and C(Y;E), such that E is a unital Banach algebra. Then we give some condition…
Some classes of weighted conditional expectation type operators on $l^2(σ)
Yousef Estaremi
In this paper, some various partial normality classes of weighted conditional expectation type operators on L2() are investigated. Also, some applications of weak hyponormal weight…
Multiplication and composition operators between two Orlicz spaces
Yousef Estaremi
In this paper we consider composition operator TM_uu$ be…