Results 11 to 20 of about 587 (264)
Internet Mathematics, 2014 Given a social network, which of its nodes are more central? This question has been asked many times in sociology, psychology and computer science, and a whole plethora of centrality measures (a.k.a. centrality indices, or rankings) were proposed to account for the importance of the nodes of a network.
P. Boldi, S. Vigna
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Group Degree Centrality and Centralization in Networks [PDF]
Mathematics, 2020 The importance of individuals and groups in networks is modeled by various centrality measures. Additionally, Freeman’s centralization is a way to normalize any given centrality or group centrality measure, which enables us to compare individuals or groups from different networks. In this paper, we focus on degree-based measures of group centrality and
Matjaž Krnc, Riste Škrekovski
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On right (left) θ-centralizers on Banach algebras [PDF]
Journal of Hyperstructures, 2023 Let A be a Banach algebra with unity 1, and θ : A → A be an continuous automorphism. In this paper we characterizea continuous linear map T : A → A which satisfies one of the following conditions:a, b ∈ A, ab = w =⇒ θ(a)T(b) = T(w),a, b ∈ A, ab = w =⇒ T ...
Ghazal Moradkhani, Neda Ghoreishi
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Green’s Relations in the Commutative Centralizers of Monounary Algebras
Demonstratio Mathematica, 2015 The paper deals with the monounary algebras for which the second centralizer equals the first centralizer. We describe Green’s relations on the semigroup C, where C is the centralizer of such algebra.
Jakubíková-Studenovská D. +1 more
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Journal of Harbin University of Science and Technology, 2021 Centralizers of the special linear Lie superalgebra sl( 2， 1) and sl( 1， 2) on the generalized Witt Lie superalgebra are studied． By solving linear equations and comparing centralizers of the even and odd parts of gl( 2， 1) and gl( 2， 1) ，centralizers ...
LIU Jiaqi, QIAN Qiguo, ZHENG Keli
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Commuting Conjugacy Class Graph of G when G / Z(G)~=D2n [PDF]
Mathematics Interdisciplinary Research, 2020 Suppose G is a finite non-abelian group and Γ(G) is a simple graph with the non-central conjugacy classes of G as its vertex set. Two different noncentral conjugacy classes C and B are assumed to be adjacent in Γ(G) if and only if there are elements a ...
Mohammad Ali Salahshour
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On Jordan Triple α-*Centralizers Of Semiprime Rings
Demonstratio Mathematica, 2014 Let R be a 2-torsion free semiprime ring equipped with an involution *. An additive mapping T : R→R is called a left (resp. right) Jordan α-*centralizer associated with a function α: R→R if T(x2)=T(x)α(x*) (resp. T(x2)=α(x*)T(x)) holds for all x ∊ R.
Ashraf Mohammad +2 more
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The Multiple Conjugacy Search Problem in Virtually Nilpotent Polycyclic Groups [PDF]
Advances in Group Theory and Applications, 2022 We present an algorithm for solving the multiple conjugacy search problem in virtually nilpotent polycyclic groups.
Carmine Monetta, Antonio Tortora
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On Groups with Extreme Centralizers and Normalizers [PDF]
Advances in Group Theory and Applications, 2016 An FCI-group is a group in which every non-normal cyclic subgroup has finite index in its centralizer and an FNI-group is one in which every non-normal subgroup has finite index in its normalizer.
Derek J.S. Robinson
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