Results 21 to 30 of about 34 (34)

Nilpotent perturbations of m-isometric and m-symmetric tensor products of commuting d-tuples of operators

Demonstratio Mathematica
If T1{{\mathbb{T}}}_{1} and T2{{\mathbb{T}}}_{2} are commuting dd-tuples of Hilbert space operators in B(ℋ)dB{\left({\mathcal{ {\mathcal H} }})}^{d} such that (T1*⊗I+I⊗T2*,T1⊗I+I⊗T2)\left({{\mathbb{T}}}_{1}^{* }\otimes I+I\otimes {{\mathbb{T}}}_{2}^{* },{
Duggal Bhagwati Prashad, Kim In Hyoun
doaj   +1 more source

What is a proper graph Laplacian? An operator-theoretic framework for graph diffusion

Special Matrices
We introduce an operator-theoretic definition of a proper graph Laplacian as any matrix associated with a given graph that can be expressed as the composition of a divergence and a gradient operator, with the gradient acting between graph-related spaces ...
Estrada Ernesto
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Quantum injectivity of G-frames in Hilbert spaces

Demonstratio Mathematica
Inspired by some recent work on the quantum detection problem by discrete frames and continuous frames, in this article, we examine the quantum detection problem with G-frames.
Hong Guoqing, Wan Linbin, Zhang Jianxia
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Operators commuting with complex symmetric weighted composition operators on H 2

Concrete Operators
In this article, we initially study when an anti-linear Toeplitz operator is in the commutant of a composition operator. Primarily, we investigate weighted composition operators Wg,ψ{W}_{g,\psi } commuting with complex symmetric weighted composition ...
Bhuia Sudip Ranjan
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Study of the asymptotic eigenvalue distribution and trace formula of a second order operator-differential equation

Boundary Value Problems, 2011
The purpose of writing this article is to show some spectral properties of the Bessel operator equation, with spectral parameter-dependent boundary condition.
Aslanova Nigar
doaj  

On the relation of the frame-related operators of fusion frame systems. [PDF]

Sampl Theory Signal Process Data Anal, 2023
Köhldorfer L, Balazs P.
europepmc   +1 more source

The spectral properties of [ m ] -complex symmetric operators. [PDF]

J Inequal Appl, 2018
Shen J.
europepmc   +1 more source

On the Normality of the Unbounded Product of Two Normal Operators

Concrete Operators, 2012
Mortad Mohammed Hichem
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An extended Hilbert's integral inequality in the whole plane with parameters. [PDF]

J Inequal Appl, 2018
He L, Li Y, Yang B.
europepmc   +1 more source