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The classification of extremely primitive groups
- Source :
- Burness, T C & Thomas, A R 2021, ' The classification of extremely primitive groups ', International Mathematics Research Notices . https://doi.org/10.1093/imrn/rnaa369
- Publication Year :
- 2020
- Publisher :
- arXiv, 2020.
-
Abstract
- Let $G$ be a finite primitive permutation group on a set $\Omega$ with nontrivial point stabilizer $G_{\alpha}$. We say that $G$ is extremely primitive if $G_{\alpha}$ acts primitively on each of its orbits in $\Omega \setminus \{\alpha\}$. These groups arise naturally in several different contexts and their study can be traced back to work of Manning in the 1920s. In this paper, we determine the almost simple extremely primitive groups with socle an exceptional group of Lie type. By combining this result with earlier work of Burness, Praeger and Seress, this completes the classification of the almost simple extremely primitive groups. Moreover, in view of results by Mann, Praeger and Seress, our main theorem gives a complete classification of all finite extremely primitive groups, up to finitely many affine exceptions (and it is conjectured that there are no exceptions). Along the way, we also establish several new results on base sizes for primitive actions of exceptional groups, which may be of independent interest.<br />Comment: 64 pages; to appear in IMRN
- Subjects :
- General Mathematics
010102 general mathematics
Primitive permutation group
010103 numerical & computational mathematics
Group Theory (math.GR)
01 natural sciences
Omega
Base (group theory)
Combinatorics
Alpha (programming language)
Group of Lie type
Simple (abstract algebra)
FOS: Mathematics
Point (geometry)
Affine transformation
0101 mathematics
Mathematics - Group Theory
Mathematics
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Burness, T C & Thomas, A R 2021, ' The classification of extremely primitive groups ', International Mathematics Research Notices . https://doi.org/10.1093/imrn/rnaa369
- Accession number :
- edsair.doi.dedup.....a6e9ab5b65452d2d8a4b2ba3d65e7b0d
- Full Text :
- https://doi.org/10.48550/arxiv.2005.11553