activity
20032024
most citedThe Brown-Colbourn conjecture on zeros of reliability polynomials is false

32 citations · 173 across the 34 of their papers we have counts for

collaborators

42 papers

math.CO2024

Cubic graphs with no eigenvalues in the interval (-1,1)

Krystal Guo, Gordon F. Royle

We give a complete characterisation of the cubic graphs with no eigenvalues in the open interval . There are two infinite families, one due to Guo and Mohar [Linear Algebra…

math.GR2024

Tactical decompositions in finite polar spaces and non-spreading classical group actions

John Bamberg, Michael Giudici, Jesse Lansdown +1

For finite classical groups acting naturally on the set of points of their ambient polar spaces, the symmetry properties of \emph{synchronising} and \emph{separating} are equivalen…

math.CO2022

Separating rank 3 graphs

John Bamberg, Michael Giudici, Jesse Lansdown +1

We classify, up to some notoriously hard cases, the rank 3 graphs which fail to meet either the Delsarte or the Hoffman bound. As a consequence, we resolve the question of separati…

math.CO2022★ 1 cited

Tournaments and Even Graphs are Equinumerous

Gordon F. Royle, Cheryl E. Praeger, S. P. Glasby +2

A graph is called odd if there is an orientation of its edges and an automorphism that reverses the sense of an odd number of its edges, and even otherwise. Pontus von Brömssen (né…

math.GR2021

The transitive groups of degree 48 and some applications

Derek Holt, Gordon Royle, Gareth Tracey

The primary purpose of this paper is to report on the successful enumeration in Magma of representatives of the conjugacy classes of transitive subgroups of the sym…

math.GR2021

Orbits of Sylow subgroups of finite permutation groups

John Bamberg, Alexander Bors, Alice Devillers +3

We say that a finite group acting on a set has Property for a prime if is a Sylow -subgroup of for all and Sylow -subgroups of …