On perfect order subsets in finite groups

Details On perfect order subsets in finite groups On perfect order subsets in finite groups

2010-07-04

arxiv.org/abs/1007.0568v1

Mathematics

Group Theory

8 pages

Scientific paper

If $G$ is a finite group and $x\in G$ then the set of all elements of $G$ having the same order as $x$ is called {\em an order subset of $G$ determined by $x$} (see [2]). We say that $G$ is a {\em group with perfect order subsets} or briefly, $G$ is a {\em $POS$-group} if the number of elements in each order subset of $G$ is a divisor of $|G|$. In this paper we prove that for any $n\geq 4$, the symmetric group $S_n$ is not $POS$-group. This gives the positive answer to one of two questions rising from Conjecture 5.2 in [3].

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