Zobrazeno 1 - 10
of 9 574
pro vyhledávání: '"Feki, A."'
This paper introduces and investigates the concept of the $q$-numerical range for tuples of bounded linear operators in Hilbert spaces. We establish various inequalities concerning the $q$-numerical radius associated with these operator tuples. Furth
Externí odkaz:
http://arxiv.org/abs/2410.03669
Autor:
Conde, Cristian, Feki, Kais
This paper explores the concept of approximate Birkhoff-James orthogonality in the context of operators on semi-Hilbert spaces. These spaces are generated by positive semi-definite sesquilinear forms. We delve into the fundamental properties of this
Externí odkaz:
http://arxiv.org/abs/2312.10135
Publikováno v:
AIMS Mathematics, Vol 9, Iss 11, Pp 30348-30363 (2024)
In this paper, we aim to investigate the class of jointly hyponormal operators related to a positive operator $ A $ on a complex Hilbert space $ \mathcal{X} $, which is called jointly $ A $-hyponormal. This notion was first introduced by Guesba et al
Externí odkaz:
https://doaj.org/article/3aff6957e57d402e92166c11a1c65f1a
Publikováno v:
Journal of Applied Science and Engineering, Vol 28, Iss 7, Pp 1601-1611 (2024)
This paper focuses on providing a semi-analytic approach for the approximate solutions of fuzzy variable-order fractional partial differential equations with Proportional delay, the fractional order derivative will be in the Caputo sense. The solutio
Externí odkaz:
https://doaj.org/article/620d45cbb4834a38b8f9a5fd6844599f
Publikováno v:
Open Mathematics, Vol 22, Iss 1, Pp 73-80 (2024)
This study explores the power vector inequalities for a pair of operators (B,C)\left(B,C) in a Hilbert space. By utilizing a Mitrinović-Pečarić-Fink-type inequality for inner products and norms, we derive various power vector inequalities. Specifi
Externí odkaz:
https://doaj.org/article/678dcefd2d944ff4ba64be00ee0e713c
Autor:
Nejmeddine Ouerghi, Wissal Abassi, Nidhal Jebabli, Moncef Feki, Anissa Bouassida, Katja Weiss, Thomas Rosemann, Beat Knechtle
Publikováno v:
BMC Research Notes, Vol 17, Iss 1, Pp 1-6 (2024)
Abstract The study aimed to investigate the effects of acute ingestion of saffron (SAF) on physiological (i.e., heart rate and blood lactate) and perceptual (i.e., ratings of perceived exertion [RPE] and feeling scale) measures in response to a repea
Externí odkaz:
https://doaj.org/article/95c3d358ae5041a7b8529725f72ea667
Autor:
Bahira Harrabi, Hmed Ben Nasr, Zahra Amri, Faten Brahmi, Abdelfattah El Feki, Khaled Zeghal, Hanéne Ghozzi, Arif J. Siddiqui, Mohd Adnan, Bandar Aloufi, Saoussen Jilani, Fehmi Boufahja, Riadh Badraoui
Publikováno v:
ACS Omega, Vol 9, Iss 24, Pp 26724-26734 (2024)
Externí odkaz:
https://doaj.org/article/48a55ef0fbf94d86bf47ddf647110b74
Autor:
Chahnez Charfi Triki, Salma Zouari Mallouli, Marwa Ben Jdila, Mariem Ben Said, Fatma Kamoun Feki, Sarah Weckhuysen, Sabeur Masmoudi, Faiza Fakhfakh
Publikováno v:
Epilepsia Open, Vol 9, Iss 3, Pp 906-917 (2024)
Abstract Objective Mutations in the cyclin‐dependent kinase‐like 5 gene (CDKL5) are associated with a wide spectrum of clinical presentations. Early‐onset epileptic encephalopathy (EOEE) is the most recognized phenotype. Here we describe phenot
Externí odkaz:
https://doaj.org/article/c640a6965bed4f77a3a6d07f66909886
The paper considers some new properties of the so-called $A$-maximal numerical range of operators, denoted by $W_{\max}^A(\cdot)$, where $A$ is a positive bounded linear operator acting on a complex Hilbert space $\mathcal{H}$. Some characterizations
Externí odkaz:
http://arxiv.org/abs/2302.00550
Autor:
Awatef Taktak, Saba Gargouri, Amel Chtourou, Fahmi Smaoui, Rim Karray, Noureddine Rekik, Lamia Feki-Berrajah, Héla Karray-Hakim
Publikováno v:
Clinical Epidemiology and Global Health, Vol 30, Iss , Pp 101824- (2024)
Background: Changing patterns in community respiratory virus activity were reported in different geographical locations during the COVID-19 pandemic. In this study, we aimed to assess the prevalence of circulating respiratory viruses, including SARS-
Externí odkaz:
https://doaj.org/article/f1ae0650c2744c08968f35a6e0a85d82