Zobrazeno 1 - 10
of 9 531
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:
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
Publikováno v:
Demonstratio Mathematica, Vol 57, Iss 1, Pp 983-1018 (2024)
The aim of this study is to obtain several inequalities involving the Berezin number and the Berezin norm for various combinations of operators acting on a reproducing kernel Hilbert space. First, we present some bounds regarding the Berezin number a
Externí odkaz:
https://doaj.org/article/b8e4e32417f0497a964418bf51c4a527
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:
Malek Eleroui, Amal Feki, Marwa Kraiem, Asma Hamzaoui, Zakaria Boujhoud, Ibtissem Ben Amara, Hatem Kallel
Publikováno v:
Heliyon, Vol 10, Iss 20, Pp e39562- (2024)
This work aims to characterize a novel water-soluble polysaccharide from Hammada scoparia leaves named PSP. The Infrared (FT-IR) and nuclear magnetic resonance (NMR) spectra confirmed the presence of different polysaccharide functional bands. The Hig
Externí odkaz:
https://doaj.org/article/331197ddf2414431ac3b679b5ea018ca
Autor:
Fatma Guermazi, Wissal Abid, Imen Baati, Farah Cherif, Emna Mziou, Dorra Mnif, Ines Feki, Rim Masmoudi, Jawaher Masmoudi
Publikováno v:
Frontiers in Psychiatry, Vol 15 (2024)
PurposeSocial media (SM) has become a common activity for today’s young people. It is sometimes overused and potentially results in SM addiction. This study aims to assess SM addiction and its associated factors in medical students and to examine i
Externí odkaz:
https://doaj.org/article/f46bcb012fc54270b80d8a257488acd1