3 citations · 3 across the 3 of their papers we have counts for
4 papers
An unusual example of a universal automorphism group
Rob Sullivan, Jeroen Winkel
Let be a Fraïssé structure (a countably infinite ultrahomogeneous structure). We refer to the class of structures embeddable in as the -age of . We consider the follo…
Determining the normal subgroups of the automorphism groups of ultrahomogeneous structures via stabilisers
Thomas Bernert, Rob Sullivan, Jeroen Winkel +1
We show the simplicity of the automorphism groups of the generic -hypertournament and the semigeneric tournament, and determine the normal subgroups of the automorphism groups o…
Flows of linear orders on sparse graphs
Rob Sullivan
We consider the topological dynamics of the automorphism group of a particular sparse graph M_1 resulting from an ab initio Hrushovski construction. We show that minimal subflows o…
Sparse graphs and the fixed points on type spaces property
Rob Sullivan
We examine the topological dynamics of the automorphism groups of omega-categorical sparse graphs resulting from Hrushovski constructions. Specifically, we consider the fixed point…