Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Samir Kabbaj"'
Autor:
Nizar El Idrissi, Samir Kabbaj
Publikováno v:
Boletim da Sociedade Paranaense de Matemática, Vol 42 (2024)
A relaxation of the notion of invariant set, known as $k$-quasi-invariant set, has appeared several times in the literature in relation to group dynamics. The results obtained in this context depend on the fact that the dynamic is generated by a grou
Externí odkaz:
https://doaj.org/article/e50cbe997e404b5f9fc139d3559bfb05
Publikováno v:
AIMS Mathematics, Vol 7, Iss 7, Pp 11851-11861 (2022)
In this paper, we introduce the notion of $ C^* $-algebra-valued $ b $-asymmetric metric spaces and show several fixed point theorems that improve on a range of recent works in the literature. The $ C^* $-algebra-valued $ b $-asymmetric metric space
Externí odkaz:
https://doaj.org/article/81d7592ae30b4a26b9ce53adb1b49a2f
Autor:
Hatim Labrigui, Samir Kabbaj
Publikováno v:
Sahand Communications in Mathematical Analysis, Vol 18, Iss 3, Pp 91-107 (2021)
In this work, we introduce a new concept of integral $K$-operator frame for the set of all adjointable operators from a Hilbert $C^{\ast}$-module $\mathcal{H}$ to itself denoted by $End_{\mathcal{A}}^{\ast}(\mathcal{H}) $. We give some properties rel
Externí odkaz:
https://doaj.org/article/0c6a4d172ecb49c480b51d316c6159c0
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2022 (2022)
In this study, we will introduce a new concept, which is a controlled K-operator frame for the space of all adjointable operators on a Hilbert A-module ℋ which denoted EndA∗ℋ, where A is a C∗-algebra. Also, we establish some results of the co
Externí odkaz:
https://doaj.org/article/08173be715e84298a833d3e6dc1b43be
Publikováno v:
Abstract and Applied Analysis, Vol 2021 (2021)
Frame theory has a great revolution for recent years. This theory has been extended from Hilbert spaces to Hilbert C∗-modules. In this paper, we define and study the new concept of controlled continuous ∗-K-g-frames for Hilbert C∗-modules and w
Externí odkaz:
https://doaj.org/article/54c786cccaed43639ac0109198057c31
Autor:
Mohamed Rossafi, Samir Kabbaj
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2021 (2021)
Frames play significant role in various areas of science and engineering. In this paper, we introduce the concept of frames for the set of all adjointable operators from ℋ to K and their generalizations. Moreover, we obtain some new results for gen
Externí odkaz:
https://doaj.org/article/917a1e0164f84850aaa1b62a4eee9932
Publikováno v:
Journal of Mathematics, Vol 2021 (2021)
In this paper, we study the concept of controlled ∗-operator frames for the space of all adjointable operators on a Hilbert C∗-module H. Also, we discuss characterizations of controlled ∗-operator frames and we give some properties. Some illust
Externí odkaz:
https://doaj.org/article/f0015f98300043f3a630fc6213fe1fe5
Publikováno v:
Journal of Mathematics, Vol 2021 (2021)
Frame theory has a great revolution in recent years. This theory has been extended from the Hilbert spaces to Hilbert C∗-modules. In this paper, we consider the stability of continuous operator frame and continuous K-operator frames in Hilbert C∗
Externí odkaz:
https://doaj.org/article/a7cbead8c3f544ce95b87bdfca257243
Autor:
Mohamed Rossafi, Samir Kabbaj
Publikováno v:
Annales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, Vol 17, Pp 17-25 (2018)
In this paper, we study *-g-frames in tensor products of Hilbert C*-modules. We show that a tensor product of two *-g-frames is a *-g-frame, and we get some result.
Externí odkaz:
https://doaj.org/article/d35e36595f504c08ae1c792e7cd4e644
Publikováno v:
Annales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, Vol 15, Pp 113-121 (2016)
In this paper, We study the superstablity problem of the cosine and sine type functional equations: f(xσ(y)a)+f(xya)=2f(x)f(y) and f(xσ(y)a)-f(xya)=2f(x)f(y), where f:S → C is a complex valued function; S is a semigroup; σ is an invo
Externí odkaz:
https://doaj.org/article/da39b6304c394bcda02dc5043566d11a