Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Baharak Moosavi"'
Autor:
Baharak Moosavi, Mohsen Shah Hosseini
Publikováno v:
Cubo, Vol 26, Iss 2, Pp 327-340 (2024)
New norm inequalities for accretive operators on Hilbert space are given. Among other inequalities, we prove that if \(A, B \in \mathbb{B(H)}\) and \(B\) is self-adjoint and also \(C_{m,M}(iAB)\) is accretive, then \begin{eqnarray*} \frac{4 \sq
Externí odkaz:
https://doaj.org/article/5f93eea6d3a3406b960da460b3ac43b5
Autor:
Mohsen Shah Hosseini, Baharak Moosavi
Publikováno v:
Проблемы анализа, Vol 9 (27), Iss 2, Pp 87-96 (2020)
In this paper, we introduce some inequalities between the operator norm and the numerical radius of adjointable operators on Hilbert 𝐶*-module spaces. Moreover, we establish some new refinements of numerical radius inequalities for Hilbert space
Externí odkaz:
https://doaj.org/article/973170e22f3348df959f1c7af072a692
Publikováno v:
AIMS Mathematics, Vol 5, Iss 2, Pp 1177-1185 (2020)
The main purpose of this paper is to discuss operator Jensen inequality for convex functions, without appealing to operator convexity. Several variants of this inequality will be presented, and some applications will be shown too.
Externí odkaz:
https://doaj.org/article/e1bd9bd2f2b548e384d54b2b68290b15
Autor:
Baharak Moosavi, Mohsen Shah Hosseini
Publikováno v:
The Journal of Analysis. 31:1393-1400
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42e6ce8f435342e8e03cf9906eb64825
https://doi.org/10.1007/s41478-022-00521-y
https://doi.org/10.1007/s41478-022-00521-y
Publikováno v:
Mathematica Slovaca. 70:233-237
We give an alternative lower bound for the numerical radii of Hilbert space operators. As a by-product, we find conditions such that$$\begin{array}{} \displaystyle \omega\left(\left[\begin{array}{cc} 0 & R \\ S & 0 \end{array}\right]\right)=\frac{\Ve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22bc096f6157a94f40403fd7a3a9386b
https://doi.org/10.1515/ms-2017-0346
https://doi.org/10.1515/ms-2017-0346
Publikováno v:
AIMS Mathematics, Vol 5, Iss 2, Pp 1177-1185 (2020)
The main purpose of this paper is to discuss operator Jensen inequality for convex functions, without appealing to operator convexity. Several variants of this inequality will be presented, and some applications will be shown too.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8832233a758d3b172ff23c39f41240ec
https://doi.org/10.3934/math.2020081
https://doi.org/10.3934/math.2020081
Publikováno v:
Georgian Mathematical Journal. 28:255-260
We extend some numerical radius inequalities for adjointable operators on Hilbert C * {C^{*}} -modules. A new refinement of a numerical radius inequality for some Hilbert space operators is given. More precisely, we prove that if T ∈ ℬ ( ℋ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b5f2dbd10b06acd9c907db85668e3f1
https://doi.org/10.1515/gmj-2019-2053
https://doi.org/10.1515/gmj-2019-2053
Publikováno v:
Проблемы анализа, Vol 8(26), Iss 3, Pp 112-124 (2019)
In this paper, we establish some Jensen-type inequalities for continuous functions of self-adjoint operators on complex Hilbert spaces. Furthermore, using the Cartesian decomposition of an operator, we improve the known result due to Mond and Peˇcar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::970607ae123421117fa0e386e3fef8b0
http://issuesofanalysis.petrsu.ru/article/genpdf.php?id=6350&lang=en
http://issuesofanalysis.petrsu.ru/article/genpdf.php?id=6350&lang=en
Autor:
Baharak Moosavi, Mohsen Hosseini Shah
Publikováno v:
Filomat. 33:2089-2093
We prove several numerical radius inequalities for products of two Hilbert space operators. Some of our inequalities improve well-known ones. More precisely, we prove that, if A,B ? B(H) such that A is self-adjoint with ?1 = min ?i ? ?(A) (the spectr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3e03269a732ad83732900aa37acf646
https://doi.org/10.2298/fil1907089h
https://doi.org/10.2298/fil1907089h