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Groups with Finitely Many Isomorphism Classes of Non-Normal Subgroups [PDF]

open access: greenAdvances in Group Theory and Applications, 2020
We study groups in which the non-normal subgroups fall into finitely many isomorphism classes. We prove that a locally generalized radical group with this property is abelian-by-finite and minimax.
Leonid A. Kurdachenko   +2 more
doaj   +2 more sources

On groups with many normal subgroups [PDF]

open access: yesInternational Journal of Group Theory, 2023
The structure of groups which are rich in normal subgroups has been investigated by several authors. Here, we prove that if a radical group G has normal deviation, which means that the set of its non-normal subgroups satisfies a very weak chain condition,
Alessio Russo, Mario Viscusi
doaj   +4 more sources

Automorphisms fixing every normal subgroup of a nilpotent-by-abelian group [PDF]

open access: yes, 2007
Among other things, we prove that the group of automorphisms fixing every normal subgroup of a nilpotent-by-abelian group is nilpotent-by-metabelian. In particular, the group of automorphisms fixing every normal subgroup of a metabelian group is soluble ...
Endimioni, G.
core   +2 more sources

On algebraic aspects of η-fuzzy subgroups [PDF]

open access: yesJournal of Fuzzy Extension and Applications, 2023
In this paper, we define the term " η-fuzzy subgroup" and show that every fuzzy subgroup is a η-fuzzy subgroup. We define some of the algebraic properties of the concept of η-fuzzy cosets. Furthermore, we initiate the study of the η-fuzzy normal subgroup
Muhammad Asghar, Khushdil Ahmad
doaj   +1 more source

Pronormality in Group Theory [PDF]

open access: yesAdvances in Group Theory and Applications, 2020
A subgroup X of a group G is said to be pronormal if for each element g of G the subgroups X and X^g are conjugate in . The aim of this paper is to study pronormality and some close embedding properties, like weak normality and weak pronormality.
Francesco de Giovanni, Marco Trombetti
doaj   +1 more source

Generalized Pythagorean Neutrosophic Sets in the Study of Group Theory [PDF]

open access: yesNeutrosophic Sets and Systems, 2021
In 2019, Jansi et al. present the notion of the Pythagorean neutrosophic set (PNS) as an extension of a neutrosophic set with dependent neutrosophic components. But due to the more complexity involved in a decision-making problem, there is a serious need
Somen Debnath
doaj   +1 more source

An algebraic analysis on exploring q-Rung orthopair multi-fuzzy sets [PDF]

open access: yesJournal of Fuzzy Extension and Applications, 2023
The q-Rung Orthopair Fuzzy set (qROF-set) environment is a contemporary tool for handling uncertainty and vagueness in decision-making scenarios. In this paper, we delve into the algebraic examination of q-rung orthopair Multi-Fuzzy Sets (MFSs) and ...
Mahalakshmi Pethaperumal   +3 more
doaj   +1 more source

Conjugate L-subgroups of An L-group and Their Applications to Normality and Normalizer

open access: yesFuzzy Information and Engineering, 2022
In this paper, the notion of the conjugate of an L-subgroup by an L-point has been introduced. Then, several properties of conjugate L-subgroups have been studied analogous to their group-theoretic counterparts.
Iffat Jahan, Ananya Manas
doaj   +1 more source

Elements Generating a Proper Normal Subgroup of the Cremona Group [PDF]

open access: yesInternational mathematics research notices, 2019
Consider an algebraically closed field ${\textbf{k}}$, and let $\textsf{Cr}_2({\textbf{k}})$ be the Cremona group of all birational transformations of the projective plane over ${\textbf{k}}$. We characterize infinite order elements $g\in \textsf{Cr}_2(
Serge Cantat   +2 more
semanticscholar   +1 more source

Structure of intersection graphs

open access: yesIndonesian Journal of Combinatorics, 2021
 Let G be a finite group and let N be a fixed normal subgroup of G.  In this paper, a new kind of graph on G, namely the intersection graph is defined and studied.
Haval M. Mohammed Salih   +1 more
doaj   +1 more source

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