Results 31 to 40 of about 521,948 (283)

Weighted Composition Operators from Hardy to Zygmund Type Spaces

open access: yesAbstract and Applied Analysis, 2013
This paper aims at studying the boundedness and compactness of weighted composition operator between spaces of analytic functions. We characterize boundedness and compactness of the weighted composition operator from the Hardy spaces to the Zygmund ...
Shanli Ye, Zhengyuan Zhuo
doaj   +1 more source

Contractive projections and operator spaces

open access: yes, 2002
Parallel to the study of finite dimensional Banach spaces, there is a growing interest in the corresponding local theory of operator spaces. We define a family of Hilbertian operator spaces H_n^k,0< k < n+1, generalizing the row and column Hilbert spaces
Neal, Matthew, Russo, Bernard
core   +1 more source

Metric characterizations II

open access: yes, 2012
The present paper is a sequel to our paper "Metric characterization of isometries and of unital operator spaces and systems". We characterize certain common objects in the theory of operator spaces (unitaries, unital operator spaces, operator systems ...
Blecher, David P., Neal, Matthew
core   +1 more source

A new version of Carleson measure associated with Hermite operator

open access: yesJournal of Inequalities and Applications, 2018
Let L=−Δ+|x|2 $L=-\Delta+|x|^{2}$ be a Hermite operator, where Δ is the Laplacian on Rd $\mathbb {R}^{d}$. In this paper we define a new version of Carleson measure associated with Hermite operator, which is adapted to the operator L.
Jizheng Huang, Yaqiong Wang, Weiwei Li
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

On hyper-reflexivity of some operator spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
In the present note, we define operator spaces with n-hyper-reflexive property, and prove n-hyper-reflexivity of some operator spaces.
H. S. Mustafayev
doaj   +1 more source

The spectra and eigenvectors for the weighted mean matrix operator

open access: yesArab Journal of Mathematical Sciences, 2015
In this paper, first we give conditions under which the weighted mean matrix operator is bounded on the weighted Hardy spaces, and we characterize the spectrum of the weighted mean matrix operator acting on some sequence spaces.
E. Pazouki, B. Yousefi
doaj   +1 more source

Operator Representations on Quantum Spaces

open access: yes, 2003
In this article we present explicit formulae for q-differentiation on quantum spaces which could be of particular importance in physics, i.e., q-deformed Minkowski space and q-deformed Euclidean space in three or four dimensions.
C. Bauer   +16 more
core   +1 more source

Reflexivity of Operator Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1982
For reflexive Banach spaces E and F (with E or F having the approximation property), the space of opeartors from E into F (the inductive tensor product of E* with F) is reflexive if and only if the operator space coincides with the inductive tensor product of E* with F.
openaire   +2 more sources

Reciprocal control of viral infection and phosphoinositide dynamics

open access: yesFEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

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