5 papers
Continuity of conditional expectation in Orlicz spaces
A. Hosseini, Y. Estaremi
The continuity of conditional expectation on Orlicz spaces is investigated. Indeed, we provide some necessary and sufficient conditions on a sequence $\{\mathcal{A}_n\}_{n\in\mathb…
On a class of m-Isometric and Quasi-m-isometric operators
Y. Estaremi, M. S. Al Ghafri, S. Shamsigamchi
In this paper we characterize -isometric and quasi--isometric weighted conditional type (WCT) operators on the Hilbert space . Also, we prove that the subclasses of $…
Isometric and Quasi-isometric weighted composition operators
M. S. Al Ghafri, Y. Estaremi, M. Z. Gashti
In this paper we characterize -isometric and quasi--isometric weighted composition operators on the Hilbert space . Also, we find that normal--isometry and normal…
Composition operators on some semi-Hilbert spaces
Y. Estaremi, M. S. Al Ghafri
This paper investigates composition operators and weighted composition operators on semi-Hilbert spaces induced by positive multiplication operators on \( L^2(μ) \). Within the fra…
On a class of lambda-hyponormal operators
Y. Estaremi, M. S. Al Ghafri, and S. Shamsigamchi
In this paper we define -hyponormal operators on an infinite dimensional Hilbert space and find a class of -hyponormal operators that can not be hypercyclic. Al…