On the diameter of permutation groups

HA Helfgott, Á Seress - Annals of mathematics, 2014 - JSTOR
Given a finite group G and a set A of generators, the diameter diam (Γ (G, A)) of the Cayley
graph Γ (G, A) is the smallest ℓ such that every element of G can be expressed as a word of …

[图书][B] Permutation groups and cartesian decompositions

CE Praeger, C Schneider - 2018 - books.google.com
Permutation groups, their fundamental theory and applications are discussed in this
introductory book. It focuses on those groups that are most useful for studying symmetric …

Growth in groups: ideas and perspectives

H Helfgott - Bulletin of the American Mathematical Society, 2015 - ams.org
This is a survey of methods developed in the last few years to prove results on growth in non-
commutative groups. These techniques have their roots in both additive combinatorics and …

On the scaling limit of finite vertex transitive graphs with large diameter

I Benjamini, H Finucane, R Tessera - Combinatorica, 2017 - Springer
Let (X n) be an unbounded sequence of finite, connected, vertex transitive graphs such that|
X n|= O (diam (X n) q) for some q> 0. We show that up to taking a subsequence, and after …

An application of the Local C(G,T) Theorem to a conjecture of Weiss

P Spiga - Bulletin of the London Mathematical Society, 2016 - academic.oup.com
Let be a connected-vertex-transitive graph, let be a vertex of and let be the permutation
group induced by the action of the vertex-stabilizer on the neighbourhood. The graph is said …

Growth in linear algebraic groups and permutation groups: towards a unified perspective

HA Helfgott - Groups St Andrews 2017 in Birmingham, 2019 - books.google.com
By now, we have a product theorem in every finite simple group G of Lie type, with the
strength of the bound depending only in the rank of G. Such theorems have numerous …

[HTML][HTML] A theory of semiprimitive groups

M Giudici, L Morgan - Journal of Algebra, 2018 - Elsevier
A transitive permutation group is semiprimitive if each of its normal subgroups is transitive or
semiregular. Interest in this class of groups is motivated by two sources: problems arising in …

Finite edge-transitive oriented graphs of valency four: a global approach

JA Al-Bar, AN Al-kenani, NM Muthana… - arXiv preprint arXiv …, 2015 - arxiv.org
We develop a new framework for analysing finite connected, oriented graphs of valency 4,
which admit a vertex-transitive and edge-transitive group of automorphisms preserving the …

Bounds on the diameter of Cayley graphs of the symmetric group

J Bamberg, N Gill, TP Hayes, HA Helfgott… - Journal of Algebraic …, 2014 - Springer
In this paper we are concerned with the conjecture that, for any set of generators S of the
symmetric group Sym(n), the word length in terms of S of every permutation is bounded …

On G-locally primitive graphs of locally twisted wreath type and a conjecture of Weiss

P Spiga - Journal of Combinatorial Theory, Series A, 2011 - Elsevier
Let Γ be a connected G-vertex-transitive graph and let v be a vertex of Γ. The graph Γ is said
to be G-locally primitive if the action of the vertex-stabiliser Gv on the neighbourhood Γ (v) of …