Results 21 to 30 of about 373,665 (180)

Bilinear Ideals in Operator Spaces [PDF]

open access: yes, 2015
We introduce a concept of bilinear ideal of jointly completely bounded mappings between operator spaces. In particular, we study the bilinear ideals $\mathcal{N}$ of completely nuclear, $\mathcal{I }$ of completely integral, $\mathcal{E}$ of completely ...
Dimant, Verónica   +1 more
core   +3 more sources

On bounded linear functional operations [PDF]

open access: yesTransactions of the American Mathematical Society, 1934
The set of all bounded linear functional operations on a given vector spacet plays an important role in the consideration of linear functional operations. For the sake of greater definiteness it is desirable to know the form of such operations and a space determined thereby.
openaire   +2 more sources

Duality in spaces of finite linear combinations of atoms [PDF]

open access: yes, 2010
In this note we describe the dual and the completion of the space of finite linear combinations of $(p,\infty)$-atoms ...
Ricci, Fulvio, Verdera, Joan
core   +1 more source

Some results on S-numerical range of operator matrices

open access: yesZanco Journal of Pure and Applied Sciences, 2020
A linear operator on a Hilbert space may be approximated with finite matrices by choosing an orthonormal basis of the Hilbert space. In this paper, we found an approximation of the S-numerical range of bounded and unbounded operator matrices by ...
Berivan Faris Azeez , Ahmed Muhammad
doaj   +3 more sources

Generalized atomic subspaces for operators in Hilbert spaces [PDF]

open access: yesMathematica Bohemica, 2022
We introduce the notion of a $g$-atomic subspace for a bounded linear operator and construct several useful resolutions of the identity operator on a Hilbert space using the theory of $g$-fusion frames.
Prasenjit Ghosh, Tapas Kumar Samanta
doaj   +1 more source

Generation type inequalities for closed linear operators related to domains with conical points [PDF]

open access: yes, 2005
Let ${\cal A}(x;D_x)$ be a second-order linear differential operator in divergence form. We prove that the operator ${\l}I- {\cal A}(x;D_x)$, where $\l\in\csp$ and $I$ stands for the identity operator, is closed and injective when ${\rm Re}\l$ is large ...
Favaron, A.
core   +3 more sources

Norm and Numerical Radius Inequalities for Sums of Bounded Linear Operators in Hilbert Spaces [PDF]

open access: yes, 2006
Some inequalities for the operator norm and numerical radius of sums of bounded linear operators in Hilbert spaces are given.
Dragomir, Sever S
core   +2 more sources

Linear Quadratic Optimal Control Problem for Linear Stochastic Generalized System in Hilbert Spaces

open access: yesMathematics, 2022
A finite-horizon linear stochastic quadratic optimal control problem is investigated by the GE-evolution operator in the sense of the mild solution in Hilbert spaces.
Zhaoqiang Ge
doaj   +1 more source

Bounded linear non-absolutely summing operators

open access: yesJournal of Mathematical Analysis and Applications, 2008
Let \(E\) and \(F\) be Banach spaces. A subset \(M\) of \(E\) is said to be lineable if there exists an infinite-dimensional vector space \(V\subset M\cup\{0\}\). Let \(\Pi_{p}(E;F)\) and \(I_{p}(E;F)\) represent the vector spaces of all absolutely \(p\)-summing operators and \(p\)-integral operators from \(E\) to \(F\), respectively.
PUGLISI, DANIELE, J. B. SEOANE SEPULVEDA
openaire   +2 more sources

A new approach to quantum backflow [PDF]

open access: yes, 2005
We derive some rigorous results concerning the backflow operator introduced by Bracken and Melloy. We show that it is linear bounded, self adjoint, and not compact.
Bogolubov N N   +11 more
core   +1 more source

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