Results 31 to 40 of about 165,123,802 (106)

Direct sum of lower semi-frames in Hilbert spaces

Gulf Journal of Mathematics
In this paper, structural properties of lower semi-frames in separable Hilbert spaces are explored with a focus on transformations under linear operators (may be unbounded). Also, the direct sum of lower semi-frames, providing necessary and sufficient conditions for the preservation of lower semi-frame structure, is examined.
Mohanarangan, Hemalatha, Johnson, P. Sam, Harikrishanan, P. K.   +2 more
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On (n,D)- quasi Operators

Iraqi Journal for Computer Science and Mathematics
T Through the article, we will provide an entirely novel type of quasi operators base on the concept of D razin inverse in Operator theory which is named (n,D) -quasi operators on the Hilbert spaces, also we explain the sum, product, and other features ...
salim dawood mohsen
doaj   +1 more source

Application Investigation of Quasi Drazin Inverse Hyponormal Operators within the Framework of Fuzzy Soft Set Theory in Hilbert Space

Journal of Applied Science and Engineering
This study aims to investigate the realm of operator theory related to Fuzzy Soft Theory. Based on fuzzy soft Hilbert spaces, a novel formula of fuzzy soft quasi-hyponormal operator via a technique of fuzzy soft Drazin inverse named the fuzzy soft n ...
Salim Dawood Mohsen, Zaid Rajih Hamza
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Spectrum of the direct sum of operators

Electronic Journal of Differential Equations, 2012
We study the connection between spectral properties of direct the sum of operators in the direct sum of Hilbert spaces and its coordinate operators.
Elif Otkun Cevik, Zameddin I. Ismailov
doaj  

Selfadjoint extensions of a singular multipoint differential operator of first order

Electronic Journal of Differential Equations, 2013
In this work, we describe all selfadjoint extensions of the minimal operator generated by linear singular multipoint symmetric differential expression $l=(l_1,l_2,l_3)$, $l_k=ifrac{d}{dt}+A_k$ with selfadjoint operator coefficients $A_k$, $k=1,2,3$ in
Zameddin I. Ismailov, Rukiye Ozturk Mert
doaj  

Normal extensions of a singular multipoint differential operator of first order

Electronic Journal of Differential Equations, 2012
In this work, we describe all normal extensions of the minimal operator generated by linear singular multipoint formally normal differential expression $l=(l_1,l_2,l_3)$, $l_k=frac{d}{dt}+A_k$ with selfadjoint operator coefficients $A_k$ in a Hilbert ...
Zameddin I. Ismailov, Rukiye Ozturk Mert
doaj  

First-order selfadjoint singular differential operators in a Hilbert space of vector functions

Electronic Journal of Differential Equations, 2017
In this article, we give a representation of all selfadjoint extensions of the minimal operator generated by first-order linear symmetric multipoint singular differential expression, with operator coefficient in the direct sum of Hilbert spaces of ...
Pembe Ipek, Bulent Yilmaz, Zameddin I. Ismailov   +2 more
doaj  

Selfadjoint extensions of multipoint singular differential operators

Electronic Journal of Differential Equations, 2013
This article describes all selfadjoint extensions of the minimal operator generated by a linear singular multipoint symmetric differential-operator expression for first order in the direct sum of Hilbert spaces of vector-functions.
Zameddin I. Ismailov
doaj  

Representation Results for Operators Generated by Quasi-Differential Multi-Interval System in a Hilbert Direct Sum Space

Rocky Mountain Journal of Mathematics, 2006
When dealing with Schrödinger operators with non-locally-integrable potentials or with Schrö\-din\-ger operators on graphs, it is convenient to split the domain into intervals \(I_i\) \((i\in \Omega)\) on which the potential is locally integrable. Then consider the differential operator \(T\) on the direct sum Hilbert space \(\bigoplus_{i\in\Omega }L^2(
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Modular flow in JT gravity and entanglement wedge reconstruction

Journal of High Energy Physics
It has been shown in recent works that JT gravity with matter with two boundaries has a type II ∞ algebra on each side. As the bulk spacetime between the two boundaries fluctuates in quantum nature, we can only define the entanglement wedge for each side
Ping Gao
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