Results 41 to 50 of about 4,389,123 (370)

On Unbounded Composition Operators in $L^2$-Spaces

, 2012
Fundamental properties of unbounded composition operators in $L^2$-spaces are studied. Characterizations of normal and quasinormal composition operators are provided. Formally normal composition operators are shown to be normal.
A Brown, A Brown, A Daniluk, A Lambert, A Lambert, A Lambert, A Lambert, C Berg, Ch. Burnap, D Harrington, E Nordgren, EA Coddington, EA Coddington, FH Szafraniec, G Biriuk, Il Bong Jung, J Janas, J Stochel, J Stochel, J Stochel, J Stochel, J Stochel, J Stochel, J Stochel, J Weidmann, Jan Stochel, JB Conway, JT Campbell, K Schmüdgen, K Schmüdgen, K Schmüdgen, M.R. Embry-Wardrop, MM Rao, MR Embry, MR Embry-Wardrop, N Dunford, P Budzyński, P Dibrell, Piotr Budzyński, PR Halmos, PR Halmos, R Whitley, RK Singh, RK Singh, RK Singh, S Kouchekian, S Ôta, T. Veluchamy, W Mlak, W Rudin, Zenon Jan Jabłoński, ZJ Jabłonski, ZJ Jabłoński   +52 more
core   +2 more sources

Slice regular composition operators [PDF]

Complex Variables and Elliptic Equations, 2015
In the article the class of slice regular functions is shown to be closed under a new regular composition. The new regular composition turns out to be globally defined in contrast to the locally defined version by Vlacci. Its advantage over Vlacci's is demonstrated by its associated theory of composition operators and dynamical systems for slice ...
Xieping Wang, Guangbin Ren
openaire   +3 more sources

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

Growth Spaces on Circular Domains Taking Values in a Banach Lattice, Embeddings and Composition Operators

Mathematics
We introduce the space of holomorphic growth spaces with values in a Banach lattice. We provide norm and essential norm estimates of the embedding operator, and we completely characterize the bounded and compact embeddings of the growth spaces using ...
Nihat Gökhan Göğüş
doaj   +1 more source

The Composite Operator Method (COM) [PDF]

, 2011
Strongly Correlated Systems: Theoretical Methods, Springer Series in Solid-State Sciences, Vol. 171 (2012) [ISBN 978-3-642-21830-9]
AVELLA, Adolfo, MANCINI, Ferdinando
openaire   +6 more sources

M-quasi-hyponormal composition operators

International Journal of Mathematics and Mathematical Sciences, 1987
A necessary and sufficient condition is obtained for M-quasi-hyponormal composition operators. It has also been proved that the class of M-quasi-hyponormal composition operators coincides with the class of M-paranormal composition operators. Existence of
Pushpa R. Suri, N. Singh
doaj   +1 more source

On compactness of the difference of composition operators [PDF]

Journal of Mathematical Analysis and Applications, 2004
AbstractLet φ and ψ be analytic self-maps of the unit disc, and denote by Cφ and Cψ the induced composition operators. The compactness and weak compactness of the difference T=Cφ−Cψ are studied on Hp spaces of the unit disc and Lp spaces of the unit circle. It is shown that the compactness of T on Hp is independent of p∈[1,∞).
Nieminen, Pekka J., Saksman, Eero
openaire   +2 more sources

Composite operators in asymptotic safety [PDF]

Physical Review D, 2017
38 ...
Carlo Pagani, Martin Reuter
openaire   +3 more sources

The cytoskeletal control of B cell receptor and integrin signaling in normal B cells and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
In lymphoid organs, antigen recognition and B cell receptor signaling rely on integrins and the cytoskeleton. Integrins act as mechanoreceptors, couple B cell receptor activation to cytoskeletal remodeling, and support immune synapse formation as well as antigen extraction.
Abhishek Pethe, Tanja Nicole Hartmann
wiley   +1 more source

Distances between composition operators [PDF]

, 2007
The norm distance between two composition operators is calculated in select ...
Matache, Valentin
core   +3 more sources