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arXiv · 2002.06522

Intersection graphs of almost subnormal subgroups in general skew linear groups

Bui Xuan Hai·Binh-Minh Bui-Xuan·Le Van Chua·Mai Hoang Bien
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Abstract

Let $D$ be a division ring, $n$ a positive integer, and GL$_n(D)$ the general linear group of degree $n$ over $D$. In this paper, we study the induced subgraph of the intersection graph of GL$_n(D)$ generated by all non-trivial proper almost subnormal subgroups of GL$_n(D)$. We show that this subgraph is complete if it is non-null. This property will be used to study subgroup structure of a division ring. In particular, we prove that every non-central almost subnormal subgroup of the multiplicative group $D^*$ of a division ring $D$ contains a non-central subnormal subgroup of $D^*$.

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Bui Xuan Hai, Binh-Minh Bui-Xuan, Le Van Chua, Mai Hoang Bien. 2020-02-16. Intersection graphs of almost subnormal subgroups in general skew linear groups. https://arxiv.org/abs/2002.06522

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