Results 31 to 40 of about 386,373 (206)

Essential Spectra of Quasi-parabolic Composition Operators on Hardy Spaces of the Poly-disc

, 2012
This work is a generalization of the results in [Gul] to bi-disc case. As in [Gul], quasi-parabolic composition operators on the Hilbert-Hardy space of the bi-disc are written as a linear combination of Toeplitz operators and Fourier multipliers.
Gül, Uğur
core   +1 more source

Centered weighted composition operators via measure theory [PDF]

Mathematica Bohemica, 2018
We describe the centered weighted composition operators on $L^2(\Sigma)$ in terms of their defining symbols. Our characterizations extend Embry-Wardrop-Lambert's theorem on centered composition operators.
Mohammad Reza Jabbarzadeh, Mehri Jafari Bakhshkandi   +1 more
doaj   +1 more source

Orlicz Spaces and Their Hyperbolic Composition Operators

Mathematics
In this paper, by extending some Lp-norm inequalities to similar inequalities for Orlicz space (LΦ-norm), we provide equivalent conditions for composition operators to have the shadowing property on the Orlicz space LΦ(μ).
Mohammed Said Al Ghafri, Yousef Estaremi, Zhidong Huang   +2 more
doaj   +1 more source

The weighted composition operators on the large weighted Bergman spaces

, 2018
In this paper, we characterize bounded, compact or Schatten class weighted composition operators acting on Bergman spaces with the exponential type weights. Moreover, we give the proof of the necessary part for the boundedness of composition operators on
Park, Inyoung
core   +1 more source

The Composition operator on hardy space H2 Induced by ?(z)=sz+t where , and

مجلة بغداد للعلوم, 2010
We study in this paper the composition operator of induced by the function ?(z)=sz+t where , and We characterize the normal composition operator C? on Hardy space H2 and other related classes of operators.
Baghdad Science Journal
doaj   +1 more source

Fourier integral operators algebra and fundamental solutions to hyperbolic systems with polynomially bounded coefficients on R^n

, 2015
We study the composition of an arbitrary number of Fourier integral operators $A_j$, $j=1,\dots,M$, $M\ge 2$, defined through symbols belonging to the so-called SG classes.
Ascanelli, A., Coriasco, S.
core   +1 more source

A Review on Classes of Composition Operators

پژوهش‌های ریاضی, 2020
Introduction In 1976, A. Lambert characterized subnormal weighted shifts. Then he studied hyponormal weighted composition operators on  in 1986 and in 1988 subnormal composition operators studied again by him. Recently, A. Lambert, et al., have published
Mohammadreza Azimi
doaj  

Strongly omnipresent operators: general conditions and applications to composition operators [PDF]

, 2002
This paper studies the concept of strongly omnipresent operators that was recently introduced by the first two authors. An operator T on the space H(G) of holomorphic functions on a complex domain G is called strongly omnipresent whenever the set of T ...
Bernal González, Luis, Calderón Moreno, María del Carmen, Grosse-Erdmann, Karl-Goswin   +2 more
core  

Effective potential for composite operators [PDF]

Physical Review D, 1996
28 pages, TeX macros: phyzzx ...
openaire   +3 more sources

Composition and Decomposition of Positive Linear Operators (VIII)

Axioms, 2023
In a series of papers, most of them authored or co-authored by H. Gonska, several authors investigated problems concerning the composition and decomposition of positive linear operators defined on spaces of functions.
Ana Maria Acu, Ioan Raşa, Andra Seserman   +2 more
doaj   +1 more source