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arXiv · 2512.02211

Covering by Centralizers

Mark L. Lewis·Ryan McCulloch
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Abstract

In this paper, we consider covers of finite groups by centralizers of elements. We show that the set of centralizers that are maximal under the partial ordering form a cover of the group. We also show that the set of centralizers that are minimal under the partial ordering form a cover of the group. We show for $F$-groups that are nonabelian $p$-groups that the number of distinct nontrivial centralizers is congruent to $1$ modulo $p$.

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Mark L. Lewis, Ryan McCulloch. 2025-12-01. Covering by Centralizers. https://doi.org/10.1007/s00605-026-02165-7

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