A new criterion for finite non-cyclic groups

Details A new criterion for finite non-cyclic groups A new criterion for finite non-cyclic groups

Publishing date

2005-09-19

URL

arxiv.org/abs/math/0509421v1

Science

Mathematics

Field

Group Theory

Additional info

6 pages

Type

Scientific paper

Abstract

Let $H$ be a subgroup of a group $G$. We say that $H$ satisfies the power condition with respect to $G$, or $H$ is a power subgroup of $G$, if there exists a non-negative integer $m$ such that $H=G^{m}=$. In this note, the following theorem is proved: Let $G$ be a group and $k$ the number of non-power subgroups of $G$. Then (1) $k=0$ if and only if $G$ is a cyclic group(theorem of F. Sz$\acute{a}$sz) ;(2) $0 < k <\infty$ if and only if $G$ is a finite non-cyclic group; (3) $k=\infty$ if and only if $G$ is a infinte non-cyclic group. Thus we get a new criterion for the finite non-cyclic groups.

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