Results 181 to 190 of about 4,355 (207)

NILPOTENCY IN UNCOUNTABLE GROUPS

Journal of the Australian Mathematical Society, 2016
The main purpose of this paper is to investigate the behaviour of uncountable groups of cardinality $\aleph$ in which all proper subgroups of cardinality $\aleph$ are nilpotent. It is proved that such a group $G$ is nilpotent, provided that $G$ has no infinite simple homomorphic images and either $\aleph$ has cofinality strictly larger than $\aleph _{0}
De Giovanni, Francesco, Trombetti, Marco
openaire   +3 more sources

Automorphism groups of nilpotent groups [PDF]

open access: possibleArchiv der Mathematik, 2003
\textit{M. Dugas} and \textit{R. Göbel} [Arch. Math. 54, No. 4, 340-351 (1990: Zbl 0703.20033)] proved the following result: if \(H\) is any group, there is a torsion-free nilpotent group \(G\) of class \(2\) such that \(\Aut(G)=H\ltimes\text{Stab}(G)\), where \(\text{Stab}(G)\) is the stability group of the series \(1\triangleleft Z(G)\triangleleft G\)
Rüdiger Göbel, Gábor Braun
openaire   +2 more sources

Automorphism Groups of Nilpotent Groups

Bulletin of the London Mathematical Society, 1989
Let \({\mathfrak X}\) denote the class of all finitely generated torsion-free nilpotent groups G such that the derived factor group G/G' is torsion- free. For G in \({\mathfrak X}\), let Aut *(G) denote the group of automorphisms of G/G' induced by the automorphism group of G. If G/G' has rank n and we choose a \({\mathbb{Z}}\)-basis for G/G' then Aut *
Bryant, R. M., Papistas, A.
openaire   +4 more sources

On the nilpotent multipliers of a group

Mathematische Zeitschrift, 1997
Let \(G\) be a group presented as a quotient of a free group \(F\) by a normal subgroup \(R\). The abelian group \(M^{(c)}(G)=(R\cap\gamma_{c+1}F)/\gamma_{c+1}(R,F)\) (\(c\geq 1\)) where \(\gamma_1F=F\), \(\gamma_{c+1}F=[\gamma_cF,F]\), \(\gamma_1(R,F)=R\), \(\gamma_{c+1}(R,F)=[\gamma_c(R,F),F]\) is called the \(c\)-nilpotent multiplier of \(G\).
Graham Ellis, John M. Burns
openaire   +3 more sources

A (locally nilpotent)-by-nilpotent variety of groups

Mathematical Proceedings of the Cambridge Philosophical Society, 2002
Given positive integers k and n, let [Xfr ] be the class of all groups G such that γk(G) is locally nilpotent and [x1, x2, …, xk]n = 1 for any x1, x2, …, xk ∈ G. It is shown that [Xfr ] is a variety.
openaire   +3 more sources

A Criterion for a Group to be Nilpotent

Bulletin of the London Mathematical Society, 1992
Let \(G\) be a finite group. The character degree frequency \(m_ G: \mathbb{N} \to \mathbb{Z}\) is defined \(m_ G(n) = |\{\chi \in \text{Irr }G\mid\chi(1) = n\}|\) and the class size frequency function \(w_ G: \mathbb{N} \to \mathbb{Z}\) by \(w_ G(n) = (1/n)|\{g \in G\mid| G: C_ G(g)| = n\}|\) which is the number of conjugacy classes of \(G\) with \(n\)
John Cossey   +2 more
openaire   +2 more sources

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