Zobrazeno 1 - 10
of 5 197
pro vyhledávání: '"operator norm"'
Autor:
Abdelkader Frakis, Fuad Kittaneh
Publikováno v:
Surveys in Mathematics and its Applications, Vol 19 (2024), Pp 317-330 (2024)
We give new numerical radius equalities and inequalities for Hilbert space operators. Also, we provide some upper bounds for the numerical radii of certain 2 × 2 operator matrices.
Externí odkaz:
https://doaj.org/article/2a929bdd3b684a1ea1931f734aaa6120
Autor:
洪勇(HONG Yong)
Publikováno v:
Zhejiang Daxue xuebao. Lixue ban, Vol 51, Iss 5, Pp 586-592 (2024)
The concept of super-homogeneous function is introduced, the homogeneous kernel, quasi-homogeneous kernel and many non-homogeneous kernel are united as super-homogeneous, as well as the boundedness problems of super-homogeneous kernel integral operat
Externí odkaz:
https://doaj.org/article/a3376a50c6c2403a9f34aface700cbc4
Publikováno v:
Demonstratio Mathematica, Vol 57, Iss 1, Pp 325-343 (2024)
This study deals with the one-parameter family {Dq}q∈[0,1]{\left\{{D}_{q}\right\}}_{q\in \left[0,1]} of Bernstein-type operators introduced by Gupta and called the limit qq-Durrmeyer operators. The continuity of this family with respect to the para
Externí odkaz:
https://doaj.org/article/3cc052a30e4b4c85b6ce7a4f5949fb8f
Publikováno v:
Special Matrices, Vol 12, Iss 1, Pp 635-655 (2024)
The geometry of the compact convex set of all n×nn\times n doubly stochastic matrices, a structure frequently referred to as the Birkhoff polytope, has been an active subject of research as of late. Geometric characteristics such as the Chebyshev ce
Externí odkaz:
https://doaj.org/article/52d90300187d4022b0baaa52ce2abb81
Publikováno v:
Axioms, Vol 13, Iss 11, p 742 (2024)
Super-homogeneous functions including homogeneous functions, quasi-homogeneous functions, and several non-homogeneous functions are considered. Using the weight function method, the construction conditions of Hilbert-type multiple integral inequaliti
Externí odkaz:
https://doaj.org/article/63317954fe5440599be8fdf24a89fcfa
Publikováno v:
Symmetry, Vol 16, Iss 9, p 1199 (2024)
In this paper, we employ a generalization of the Boas–Bellman inequality for inner products, as developed by Mitrinović–Pečarić–Fink, to derive several upper bounds for the 2p-th power with p≥1 of the numerical radius of the off-diagonal o
Externí odkaz:
https://doaj.org/article/1f5aa7c1b0ae4e02bea415f47c77f572
Akademický článek
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Autor:
Fadime Gökçe
Publikováno v:
Universal Journal of Mathematics and Applications, Vol 6, Iss 2, Pp 76-85 (2023)
In the present paper, by estimating operator norms, we give some characterizations of infinite matrix classes $\left( \left\vert E_{\mu }^{r}\right\vert _{q},\Lambda\right) $ and $\left( \left\vert E_{\mu }^{r}\right\vert _{\infty },\Lambda\right) $,
Externí odkaz:
https://doaj.org/article/e61644ecb0d24494a31e21751b9fe31d
Autor:
Ransford Thomas
Publikováno v:
Moroccan Journal of Pure and Applied Analysis, Vol 9, Iss 2, Pp 276-290 (2023)
In this expository article, we discuss the evaluation and estimation of the operator norms of various functions of the Volterra operator.
Externí odkaz:
https://doaj.org/article/76312ce0511548369e16db4d51b47fb3