Results 11 to 20 of about 5,046 (150)

On the Nielsen-Schreier Theorem in Homotopy Type Theory [PDF]

open access: yesLogical Methods in Computer Science, 2022
We give a formulation of the Nielsen-Schreier theorem (subgroups of free groups are free) in homotopy type theory using the presentation of groups as pointed connected 1-truncated types.
Andrew W Swan
doaj   +1 more source

Bounds on the Number of Maximal Subgroups of Finite Groups: Applications

open access: yesMathematics, 2022
The determination of bounds for the number of maximal subgroups of a given index in a finite group is relevant to estimate the number of random elements needed to generate a group with a given probability.
Adolfo Ballester-Bolinches   +2 more
doaj   +1 more source

Groups in which Every Subgroup of Infinite Rank is Nearly Permutable [PDF]

open access: yesAdvances in Group Theory and Applications, 2017
In this paper, the structure of locally finite groups of infinite rank whose subgroups of infinite rank have finite index in a permutable subgroup is investigated.
A.V. De Luca, R. Ialenti
doaj   +1 more source

The number of maximal subgroups and probabilistic generation of‎ ‎finite groups [PDF]

open access: yesInternational Journal of Group Theory, 2020
In this survey we present some significant bounds for the‎ ‎number of maximal subgroups of a given index of a finite group‎. ‎As a‎ ‎consequence‎, ‎new bounds for the number of random‎ ‎generators needed to generate a finite $d$-generated group with high‎
Adolfo Ballester Bolinches   +3 more
doaj   +1 more source

Generalized Quasinormal Subgroups of Order $p^2$ [PDF]

open access: yesAdvances in Group Theory and Applications, 2016
In a recent paper, Cossey and Stonehewer introduced a generalization of the concept of quasinormal subgroups as a consequence of their discovery of a scarcity of the latter in certain finite $p$-groups of an important universal nature.
Stewart Stonehewer
doaj   +1 more source

Generation of Finite Groups and Maximal Subgroup Growth [PDF]

open access: yesAdvances in Group Theory and Applications, 2020
Let G be a finite group and, for n 2 N, denote by m_n(G) the number of maximal subgroups of G with index n. Let M(G) = sup_{n>2} log m_n(G)/log n and let E_1(G) be the expected number of elements of G which have to be drawn at random, with ...
Andrea Lucchini, Mariapia Moscatiello
doaj   +1 more source

Bicyclic commutator quotients with one non-elementary component [PDF]

open access: yesMathematica Bohemica, 2023
For any number field $K$ with non-elementary $3$-class group ${\rm Cl}_3(K)\simeq C_{3^e}\times C_3$, $e\ge2$, the punctured capitulation type $\varkappa(K)$ of $K$ in its unramified cyclic cubic extensions $L_i$, $1\le i\le4$, is an orbit under the ...
Daniel C. Mayer
doaj   +1 more source

On the Residual Finiteness of Some Generalized Products of Soluble Groups of Finite Rank

open access: yesМоделирование и анализ информационных систем, 2013
Let G be a free product of residually finite virtually soluble groups A and B of finite rank with an amalgamated subgroup H, H 6= A and H 6= B. And let H contains a subgroup W of finite index which is normal in both A and B.
A. V. Rozov
doaj   +3 more sources

A note on finite groups with the indice of some maximal subgroups being primes [PDF]

open access: yesInternational Journal of Group Theory, 2017
‎The Theorem 12 in [A note on‎ ‎$p$-nilpotence and solvability of finite groups‎, ‎J‎. ‎Algebra 321‎ ‎(2009) 1555--1560.] investigated the non-abelian simple groups in‎ ‎which some maximal subgroups have primes indices‎. ‎In this note we‎ ‎show that this
Cui Zhang
doaj   +1 more source

Certain Topological Indices of Non-Commuting Graphs for Finite Non-Abelian Groups

open access: yesMolecules, 2022
A topological index is a number derived from a molecular structure (i.e., a graph) that represents the fundamental structural characteristics of a suggested molecule.
Fawad Ali   +5 more
doaj   +1 more source

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