3 citations · 5 across the 3 of their papers we have counts for
3 papers
math.CO2011
On fixing boundary points of transitive hyperbolic graphs
Agelos Georgakopoulos, Matthias Hamann
We show that there is no 1-ended, planar, hyperbolic graph such that the stabilizer of one of its hyperbolic boundary points acts transitively on the vertices of the graph. This gi…
math.GR2009★ 3 cited
Lamplighter graphs do not admit harmonic functions of finite energy
Agelos Georgakopoulos
We prove that a lamplighter graph of a locally finite graph over a finite graph does not admit a non-constant harmonic function of finite Dirichlet energy.
math.CO2009★ 2 cited
On 3-coloured tournaments
Agelos Georgakopoulos, Philipp Sprüssel
We (re-)prove that in every 3-edge-coloured tournament in which no vertex is incident with all colours there is either a cyclic rainbow triangle or a vertex dominating every other…