Illinois Journal of Mathematics

Finite transitive permutation groups and bipartite vertex-transitive graphs

Cheryl E. Praeger

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We prove a structure theorem for a class of finite transitive permutation groups that arises in the study of finite bipartite vertex-transitive graphs. The class consists of all finite transitive permutation groups such that each non-trivial normal subgroup has at most two orbits, and at least one such subgroup is intransitive. The theorem is analogous to the O'Nan-Scott Theorem for finite primitive permutation groups, and this in turn is a refinement of the Baer Structure Theorem for finite primitive groups. An application is given for arc-transitive graphs.

Article information

Illinois J. Math., Volume 47, Number 1-2 (2003), 461-475.

First available in Project Euclid: 17 November 2009

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Zentralblatt MATH identifier

Primary: 20B25: Finite automorphism groups of algebraic, geometric, or combinatorial structures [See also 05Bxx, 12F10, 20G40, 20H30, 51-XX]
Secondary: 05C25: Graphs and abstract algebra (groups, rings, fields, etc.) [See also 20F65]


Praeger, Cheryl E. Finite transitive permutation groups and bipartite vertex-transitive graphs. Illinois J. Math. 47 (2003), no. 1-2, 461--475. doi:10.1215/ijm/1258488166.

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