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math.CO2022
Uncountably many enumerations of well-quasi-ordered permutation classes
Robert Brignall, Vincent Vatter
We construct an uncountable family of well-quasi-ordered permutation classes, each with a distinct enumeration sequence. This disproves a conjecture that all well-quasi-ordered per…
math.CO2022★ 2 cited
A framework for minimal hereditary classes of graphs of unbounded clique-width
Robert Brignall, Daniel Cocks
We create a framework for hereditary graph classes built on a two-dimensional grid of vertices and edge sets defined by a triple of objects that defin…